JPS584647Y2 - Square chisel installation angle setting device for square chisel machine - Google Patents

Description

[Detailed description of the invention] Currently, in a square chisel machine, a square chisel is attached to the lower end of a spindle case directly or indirectly through a sleeve so that it can rotate in the left and right directions, and can be loosened and tightened with a butterfly bolt or the like. A chisel configured to be able to process dovetail and hook handle holes by changing the angle from the center position to the left and right from the center position that can process half-phase holes has been implemented, but according to those square chisel machines, Setting the chisel to the above-mentioned winter hole machining angle is very troublesome and time consuming, and it is difficult to always set the chisel to a constant angle.

゛Therefore, as a result of consideration in view of the above-mentioned circumstances, the present invention is based on a square chisel installation angle setting device, and its purpose is to easily and easily adjust the square chisel to various handle hole machining angles. It can be mounted in a fixed position at all times,
Moreover, the square hole □ can be easily positioned and fixed at the flat hole machining angle simply by rotating the set holder.

The drawings showing the embodiments of the present invention will be described in detail below. A square chisel 4 is rotatably connected to the shaft of a motor (not shown) by a gear transmission mechanism with reduction gear, etc., and is rotatably held on the cylindrical lower end 1a of the spindle case 1, either directly or by fitting a sleeve 3 thereto. At the same time, the sleeve 3 is screwed onto a set screw 6 inserted through a long hole 5 bored in the circumferential direction on one side of the lower end 1a. The square chisel 4 can be rotated left and right around the axis within the effective length of the elongated hole 5, and the square chisel 4 can be rotated around the sleeve 3 by means of a butterfly bolt 7 screwed into the spindle case 1.
The square chisel 4 can be loosened and tightened at the same time, and the square chisel 4 can be fixed at any desired adjusted mounting angle. 9, the mounting angle of the corner square 4 is visually observed to obtain a desired mounting angle.

Thus, in FIGS. 1 to 3 A, B, and C, the square chisel attachment angle setting device of the square chisel machine a is buttoned in the lower end of the spindle case 1, and is mounted on one side of the sleeve 3 (when the sleeve is When the cutout part 3a is cut out in a plane (one side of the square chisel), a mounting hole 11. is arranged at right angles to the axial direction of the sleeve 3 so that one end thereof can be rotated by protruding outward, and the outer peripheral surface 12a is arranged at right angles to the axial direction of the sleeve 3.
The set holder 12 has a cutout surface 13 for setting the dovetail angle on the outer periphery of the set holder 12.
Then, the notch angle setting notch surface 14 is moved in the circumferential direction to form a two-dimensional cutout shape, and the set holder 12 is rotated with respect to the cutout interior 3a, and the outer peripheral surface 12a and the dovetail The corner and bevel angle setting notch surfaces 13 and 14 can be selectively opposed to each other, and the outer circumferential surface 3a and the cutout interior 3a abut against a flat surface as shown in FIG. 3a to prevent rotation of the square chisel 4. FIG. 3B shows the cutout surfaces 13 and 14 for setting the dovetail angle and bevel angle facing the cutout interior 3a.

In state C, the square chisel 4 can be rotated in the left-right direction together with the sleeve 3 by rotation angles α, α, β, β, and the end of the cutout interior 3a abuts on the cutout surface 13 or 14, so that the rotation angle α ,α
, β, β so that the above double-sided plane 13.14
are cut out with different cutting depths, and the free end of the leaf spring 16, one end of which is fixed to the spindle case 1 with a screw 15, is brought into elastic contact with the circumferential spring receiving groove 1T to form the set holder 12. The axial blank outline prevents the set holder 12 from coming out, and also gives a sense of moderation to the set holder 12 so that the outer circumferential surface 12a and the notch surfaces 13 and 14 are held in positions facing each other with respect to the notch interior 3a. This is what I did.

Here, the cutout surface 13 for setting the dovetail angle is provided with a deeper cutting depth than the cutout surface 14 for setting the dovetail angle,
The left and right rotation angle of the square chisel 4 when facing each cutout interior 3a is α as shown in FIG. 3B when using the cutout surface 13,
The angles α and ct are set in advance to be large at the angle α and small at the angles β and β when using the notch surface 14 as shown in FIG. 3C, and the angles α and ct are In addition to the machining angles α' and α' of the dovetail hole 18, the above-mentioned angle β.

β is the machining angle β', lj' of the hook tag 19 shown in FIG.
The settings are set to match respectively.

Further, according to the present invention, the outer periphery of the part of the set holder 12 that comes into contact with the cutout 3a is eccentric by the rotation center 0 y of the set holder 12, and the outer periphery 12a of that part protrudes in the radial direction. The cut-out interior 3a is formed so that it can be press-fitted.

In FIGS. 4, 5, and 6, W indicates a workpiece, and 20 in FIG. 4 indicates a flat hole.

In the above configuration, the square chisel 4 can hold the set bolt 6 in a state in which the butterfly bolt 7 is released and rotate left and right within the effective length of the elongated hole 5, so that the set holder 12 can be rotated. , its outer circumferential surface 12a is the cutout inside 3 of the sleeve 3.
When rotated to a position opposite to a, the curved surface of the outer circumferential surface 12a comes into pressure contact with the cutout inner part 3a, so the cutout inner part 3a becomes parallel to the outer circumference 12a, so that the square chisel 4 is in a parallel position, and the set holder 12, the outer peripheral surface 12a of the outer periphery, which is eccentric from the center of rotation, strongly presses against the notch 3a, so that the square chisel
2a, as shown in FIGS. 2 and 3A, and is tightened by the outer circumferential surface 12a, so that in the half-phase hole machining position of the square chisel 4,
The square chisel 4 can be positioned and fixed without needing to be fixed with the butterfly bolt 7.

Therefore, the half-phase hole 20 shown in FIG.
Can be processed in the order of similar and ■.

Next, when positioning the square chisel 4 at the dovetail hole machining angle, from the above state, the set holder 12 is rotated 180 degrees counterclockwise in FIG. After the pressure contact is released, the dovetail angle setting notch surface 13 is opposed to the dovetail angle setting notch surface 13, and a gap is created between the two as shown in FIG. 3B.

Further, when the set holder 12 is rotated 90 degrees clockwise from the above position and the dovetail angle setting notch surface 14 is opposed to the notch surface 3a as shown in FIG. Although a gap is created, this gap is narrower than when the dovetail angle setting notch surface 13 is used.

Therefore, in the state shown in FIGS. 3B and 3C, the corner hole 4 can be rotated in both left and right directions from the above-mentioned flat force position, together with the sleeve 3, and the respective notch surfaces 13 or 14 are attached to the ends of the cutout interior 3a. As a result, the notch surface 13 rotates at a rotation angle α, α, and the notch surface 14 rotates at a rotation angle β,
To obtain β, after setting the desired mounting angle of the square chisel 4 in this way, fix it with the butterfly bolt 7, and process the dovetail hole 18 shown in Fig. 5 in the order of ■ and ■. possible, while the 6th
The kama-no-fuda shown in the figure 19 k”! @ , ■, ■, ■, ■.

■It can be processed in the following order.

As explained above, according to the square chisel attachment angle setting device according to the present invention, the spindle case 1 The outer circumferential surface 12a of the set holder 12 freely provided in
3. By selectively facing 14, the square chisel 4 can be easily and easily set at a constant angle at each processing attachment angle of the hiragiri drying and dovetail handle hole or the kama nobi tag by rotating operation. In addition, especially according to the present invention, since the part of the set holder 12 that contacts the notch 3a is provided eccentrically from the center of rotation, the square chisel 4 can be used to machine the paulownia hole with the butterfly bolt 7 released. When positioning the set holder 12 in parallel, the cutout 3a is pressed against the outer circumferential surface 12a which is displaced by the rotation of the set holder 12, so even if the corner hole 4 is displaced, the set holder 12' can be rotated. Just by doing this, the square chisel 4 is positioned in parallel by the pressure caused by the above-mentioned pressure contact, and the set holder 12 is
By rotating the square chisel 4, the square chisel 4 can be completely positioned and fixed, eliminating the need for final fixing with the butterfly bolt 7, which greatly simplifies the positioning and fixing operation of the square chisel 4. In addition, since the eccentric curved surface of the outer periphery presses against the notched interior 3a, the rotation of the set holder 12 for positioning and fixing the angle chisel 4 can be done in a circular motion, and the fixation is completed and the tightening release operation is easy. It has practical effects such as:

[Brief explanation of the drawing]

Fig. 1 is a front view showing the angle setting device according to the present invention together with a part of the square chisel machine, Fig. 2 is a vertical side view of the device, and Fig. 3 A, B, and C are the In the diagram, ■- and ■ line cut-out cross-sections are shown, respectively.A is the state of the corner hole machining position, B is the state of the corner hole IJAf'l hole machining position, and C is the state of the hole machining position. This is the state of the square chisel hole machining position. FIGS. 4, 5, and 6 are plan views of the workpiece showing the machining states of the flat handle hole, dovetail hole, and hook handle hole, respectively. a... Square chisel machine, b... Bilateral chisel installation angle setting device 1... Spindle case, 3...
...Sleeve, 3a...Cut inside, 4...
・Square chisel, 1... Butterfly bolt, 12...
Set holder, 12a... Outer peripheral surface of set holder, 13.14... Notch surface.

Claims (1)

[Scope of utility model registration request] In a square chisel machine a, which is rotatably attached to the lower end of a spindle case 1 and holds a square chisel 4 that can be loosened and tightened by a butterfly bolt 1, etc., a part of the sleeve 3 that is integral with the square chisel or the square chisel is provided. Opposing the cutout 3a formed on the side,
A set holder 12 provided with a plurality of cutout surfaces 13 and 14 with different depths that allow the square chisel to be set at a desired angle left and right.
The corner chisel of the square chisel machine is characterized in that the set holder is mounted so that it can be rotated, the outer circumferential surface 12a of the set holder is eccentrically shaped from the center of rotation, and the cutout can be fixed by pressure contact. Mounting angle setting device.