JPS584602B2 - Square chisel installation angle setting device for square chisel machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, in a square chisel machine, a square chisel is rotatably attached to the lower end of a spindle case and is loosened by a butterfly bolt or the like. A device in which a flat handle hole, a hooked handle hole, a dovetail handle hole, etc. can be formed by adjusting the square chisel to any desired angle has been put into practice.

The present invention relates to a square chisel installation angle setting device for the above-mentioned square chisel machine, and its purpose is to accurately set the square chisel to any desired angle by a simple and easy operation. .

In the following, the drawings showing a specific example of carrying out the present invention will be described in detail. First, in FIGS. 1 and 2, a square chisel machine a has a motor case 2 and a spindle case 3 fixed to a machine body 1. , a spindle 4 bearing in the machine body 1 and a spindle case 3 is coupled to a shaft 5a of a motor 5 in a deceleration-interlocking manner through a gear transmission mechanism 6 to be driven and rotated, and is also connected to the spindle 4 and driven. The square chisel 7 is rotatably fitted into a cylindrical portion 3a formed at the lower end of the spindle case 3 so that the mounting angle can be adjusted, and is fixed at the adjusted angle with a butterfly bolt 20. has been completed.

Further, the square chisel 7 may be directly fitted into the cylindrical portion 3a, or may be rotatably attached to the sleeve 8 as shown in the figure.
In either case, a fixing bolt 10 inserted through a long hole 9 provided in the circumferential direction of the cylindrical portion 3a is screwed into the long hole 9. It is possible to rotate left and right within the range of the effective length.

Here, the effective length of the elongated hole 9 is defined as a length at which the square chisel 7 can obtain a rotation angle sufficient for machining a dovetail hole and a dovetail hole as well as a flat hole as described later.

Thus, the square chisel attachment angle setting device b of the present invention is installed on the - side of the above-mentioned S-IJ piece 8 (one side of the square chisel when no sleeve is used) in FIGS. 1 and 3 A, B, and C. missing circle part 11
is provided on one side of the lower end cylindrical part 3a of the spindle case 3 so as to be in contact with the circular cutout part 11, and is inserted into horizontally installed mounting holes 12, 12 so that the set holder 13 can be rotated. Projects outward in a direction perpendicular to the axis 7a of the square chisel I, that is, the plane 1 of the missing circular portion 11.
1a, and the plane 1 of the missing circular portion 11.
1a and the outer circumferential surface 13a are set and arranged so that they can come into contact with each other, as shown in FIG.
As shown in FIG. 3A, the rotation of the square chisel 7 is prevented by bringing the outer circumferential surface 13a into contact with the flat surface 11a,
In this state, set to machine a flat pattern hole, and also
A plurality of notches are provided on the outer periphery excluding the portion of the outer circumferential surface 13a that contacts 1a, that is, in the illustrated example, a dovetail angle setting notch 14,
The dovetail angle setting notches 15 are arranged planarly and at substantially right angles to each other. The dovetail angle is set to be smaller than the distance L of the corner setting notch 15, and the dovetail angle is set so that the set holder 13 is rotated from the position shown in FIG. In the state shown in FIG. 3B or C in which the notch 14 and the notch 15 for setting the hook angle are displaced, the square chisel 7 is integral with the sleeve 8, and the angle chisel 7 is formed at the same angle α, α, or β from the center line 7b to the left and right, respectively. , β, and the rotation angles α, α are set to be larger than the rotation angles β, β.

That is, the rotation angles α and α correspond to the machining angles α′ and α′ of the dovetail hole 16 shown in FIG. 4, and the rotation angles β and β correspond to the machining angles α′ and α′ of the dovetail hole 17 shown in FIG. It is set in advance to correspond to the angles β' and β', respectively.

':1' Also, the set holder 13 has a leaf spring receiving groove 18.
The set holder 13 is positioned by fitting a leaf spring 19 with one end fixed to the cylindrical portion 3a of the spindle case 3 around the circumference of the spindle case 3 to position the set holder 13. When provided in a plane corresponding to both the notches 14 and 15 for setting the corner and bevel angle, the leaf spring 19 can give a sense of moderation to the set holder 13 in both the dovetail angle and bevel angle setting positions. , positioning at each position can be facilitated.

Further, the dovetail angle and bevel angle setting notches 14 and 15 are not limited to the two shown in the example shown, but it is possible to provide a plurality of other notches with different depths. By providing a large number of cutting arrow parts in this manner, many dovetails and cutting angles of the hook shaft hole can be set as described above.

In FIG. 2, reference numeral 22 indicates a scale plate for setting the mounting angle of the square chisel 7, in FIGS. 4 to 6, W indicates a workpiece, and in FIG. 6, reference numeral 21 indicates a flat handle hole.

In the above configuration, the tightening of the square chisel 7 is released by loosening the butterfly bolt 20, so by gripping and rotating the stop bolt 1O, the square chisel 7 can be moved within the effective length of the elongated hole 9. However, the rotation is restricted by the above-mentioned driving angle setting device b.

Therefore, when the set holder 13 is rotated and its outer circumferential surface 13a is brought into contact with the flat surface 11a of the circular cutout 11 of the sleeve 8 as shown in FIGS. 1 and 3A, the sleeve 8
The rotation of the square chisel 7, which is integral with the plane 11, is prevented from rotating.
Since a is held at a right angle to the center line 7b, the square chisel 7
is held at the center position without being rotated in either the left or right direction with respect to the center line 7a.

After tightening the butterfly bolt 20 in this state, if the motor 5 is started and the square chisel 7 is driven, a flat handle hole 21 as shown in FIG. 6 is cut into the workpiece W. In other words, the flat surface 11a of the missing circular portion 11 in the sleeve 8 is processed in this order.
By abutting the outer circumferential surface 13a of the set holder 13 on the set holder 13, the square chisel 7 can be set to the mounting angle for machining the flat handle hole.

Next, loosen the butterfly bolt 20 and set the set holder 1.
Rotate 3 180 degrees clockwise in Fig. 1 to remove the dovetail angle setting notch. 14 is placed opposite the notched circular portion 11 of the sleeve 8 in the state shown in FIG. It will be able to rotate left and right together with chisel 7.

Therefore, when the square chisel 7 is rotated along with the sleeve 8 to the left from the center line 7b in the figure, that is, in a counterclockwise direction, one end of the cutout circular portion 11 is rotated by an angle α from the centerline 7b. When it comes into contact with , the rotation stops, resulting in the state shown by the broken line in the figure.

In other words, the square chisel 7 is rotated leftward from the center line 7b by an angle α and then stopped.
Since the machining angle of the 5-handle hole is set to α', by fixing the square chisel 7 to this mounting angle with the butterfly bolt 20, it is possible to drill the part marked with ■ in the workpiece W in FIG. 4.

Furthermore, by rotating the sleeve 8 in the opposite direction to that described above, the square chisel 7 can be set at an angle α to the right from the center line 7b, as shown by the two-dot broken line in FIG. 3B. In this case, the hole 0 in Fig. 4 can be drilled, so the dovetail hole l6
can be processed.

Further, in the state shown in FIG. 3C in which the set holder 13 is rotated so that the notch 15 faces the circular cutout 11 of the sleeve 8, the sleeve 8 and the square chisel 7 move to the left and right at an angle β, respectively, in the same manner as described above. It can be rotated by β, and the machining angle β' of the hook shaft hole 17 is
, β'.

Therefore, when machining the sickle handle hole 17 into the workpiece W, the square chisel 7 is set to the above-mentioned flat handle hole machining angle, and as shown in FIG.
, ■ After machining the parts marked ■, rotate the set holder 13 as described above, adjust the mounting angle of the square chisel 7 to the β angle described above, process the parts marked ■ and ■ in the figure, and then, By rotating the square chisel 7 by an angle β in the opposite direction to that described above to set the mounting angle, and machining the portions marked ■ and ■ in the figure, it is possible to process as shown.

As explained above, according to the square chisel attachment angle setting device according to the present invention, the square chisel that is rotatably fitted into the spindle case 3 or the sleeve 8 that is integral with the square chisel
The set holder 1
3 and make the outer circumferential surface 13a or the notch 14 or 15 for setting the dovetail angle or hook angle formed cut out on the outer circumference of the set holder 13 face each other, thereby forming a flat hole and a dovetail pattern. Since the mounting angle of the square chisel 7 can be set in accordance with the machining angle of each hole or hook handle hole, the square chisel 7 can be set at the mounting angle according to the purpose very easily. In addition, the cutout portion 11 and both cutout portions 14 and 15 for setting the dovetail angle or bevel angle are formed in a plane so that the left and right rotation of the square chisel 7 is possible. Since the angles are set the same, the structure is simple and it is not only easy to manufacture, but there is no possibility of any deviation in the setting of each mounting angle according to the cutting purpose of the square chisel 1. There are advantages such as the ability to accurately set the mounting angle over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of an example of a square chisel equipped with a setting device for attaching a square chisel according to the present invention, FIG. 2 is a front view showing the main parts of the square chisel, and FIG. 3A , B, and C are cross-sectional views taken along the line ■-■ in Fig. 1, where A is the state in which the square chisel is set to the flat-handle hole processing state, and B is the state in which the square chisel is set to the dovetail-handle hole processing state. , C respectively show the state in which the square chisel is set to the machining state of the sickle handle hole. FIGS. 4, 5, and 6 are plan views of a workpiece showing the state in which a dovetail hole, a sickle dead hole, and a flat hole are machined using the same-angled chisel, respectively. a... Square chisel machine, b... Square chisel installation angle setting device, 3... Spindle case, 7...
...Square chisel, 8...Sleeve, 11...
... Missing circular part, 13... Set holder, 13a
・・・・・・Outer surface of set holder, 14, 15...
...Notch for setting dovetail angle and bevel angle, 16...
...Dovetail hole, 17...Sickle hole, 20...
... Butterfly bolt.

Claims (1)

[Claims] 1 Attach a square chisel to the lower end of the spindle case so that it can rotate freely and loosen it with a butterfly bolt, etc. In a square chisel machine that can be tightened and held, a cutout is provided on one side of the square chisel or a sleeve that is integral with the square chisel, and the cutout and the circumferential surface abut to prevent rotation of the square chisel. In addition, a set holder provided with a plurality of notches that can be rotationally displaced to allow left and right rotation of the square chisel to the dovetail hole or hook hole machining angle is rotatably attached to the spindle case. Features: Square chisel mounting angle setting device for square chisel machine.