JPH0872014A - Woodworking lathe - Google Patents

Abstract

PURPOSE: To make an end part of a work processed into a truncated conical state insertable into a slope part of one end of a shaft hole, by a method wherein the slope part whose inside diameter is increased gradually toward an opening part is provided on one end of the shaft hole of a spindle. CONSTITUTION: An Annular flange part 35 is provided on one end side of a spindle 32 and further screw face 36 is provided on the outer circumference of the tip side of the flange part. A shaft hole 37 of a concentric state is provided on the spindle 32 by penetrating the spindle 32 in a longitudinal direction. A slope part 37a whose inside diameter is increasing gradually toward an opening part 38 is provided on one end side of the shaft hole 37. Since the slope 37a whose inside diameter is increasing gradually toward the opening part 38 is provided on one end of the shaft hole 37 of the spindle 32 like this, either an end part of a work processed into a truncated conical state or a truncated conical claw chuck to hold the work can be inserted into the slope of the one end of the shaft hole 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woodworking lathe.

[0002]

2. Description of the Related Art In a woodworking potter's wheel, a motor drives a spindle to rotate, and one end of the spindle chucks a workpiece to rotate the workpiece while rotating it with a blade. As a method of chucking the work piece, a vacuum chuck method in which the work piece is sucked by a vacuum pump or a method in which the work piece is fixed by a three-jaw chuck has been conventionally used.

[0003]

However, these conventional chuck methods have a problem that the chuck mechanism is complicated, the woodworking lathe is large, and expensive. An object of the present invention is to solve such problems and to provide a small and inexpensive woodworking lathe.

[0004]

In order to achieve the above object, in the woodworking lathe of the present invention, an inclined portion whose inner diameter gradually increases toward the opening is provided at one end of the shaft hole of the spindle. Is characterized by.

[0005]

As described above, in the woodworking lathe according to the present invention, since one end of the shaft hole of the spindle is provided with an inclination in which the inner diameter gradually increases toward the opening, the end of the work piece processed into a frustoconical shape. Can be inserted into the inclined portion at one end of the shaft hole, or a frustoconical claw chuck for holding the workpiece can be inserted.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a woodworking lathe according to an embodiment of the present invention. On the upper surface of the base 1, first and second frame plates 2 and 3 are attached at their lower ends at right angles to mounting pieces 2a and 3
It is fixed by a screw 4 at a. First, second
The frame plates 2, 3 are pipe-shaped parallel shaft shafts 5, 6 and 7, 8 at their upper and middle portions.
It is connected and fixed with. On the frame shafts 7 and 8,
A flat motor base 10 is attached.

That is, as shown in FIG. 3, a pipe 11 is fixed to the lower surface of one end of the motor base 10,
One frame shaft 8 is attached to the pipe 11 so as to be rotatable and axially movable. The motor base 10 and the pipe 11 are provided with a threaded hole 12 penetrating therethrough. By lightly tightening the tip of the tightening screw 13 to the frame shaft 8, the motor base 10 cannot move in the axial direction of the frame shaft 8, Rotation is possible.

On the other frame shaft 8, the pipe 1
4 is attached so as to be rotatable and axially movable. An ear piece 15 having a screw hole 15a is provided on the pipe 14 so as to project outward in the radial direction. On the other end side of the motor base 10, a protruding piece 16 is projected outward from the frame shaft 7.
The projecting piece 16 is provided with a hole 16a larger than the bolt 17 and smaller than the head 17a of the bolt 17. Bolt 17 inserted in this hole 16a
Is screwed into the screw hole 15a of the ear piece 15.

Therefore, the ear piece 15 of the pipe 14 is replaced by the pipe 1.
The motor base 10 can rotate counterclockwise (in the drawing) about the frame shaft 8 within a range in which the motor base 10 moves upward by the rotation of 4.

On the upper surface of the motor base 10, the drive shaft 21
The motor 20 is fixed so that is parallel to the frame shafts 5, 6, 7, and 8. A plurality of stages of pulleys 22 are fixed to a drive shaft 21 of the motor 20.

A spindle 32 is rotatably mounted above the first and second frame plates 2 and 3 by U-shaped supports 30 and 31 in parallel with the frame shafts 5, 6, 7 and 8. Has been.

A pulley 33 is fixed to the spindle 32, and a belt 34 is stretched between the pulley 33 and the pulley 22 fixed to the drive shaft 21 of the motor 20.

When a sudden and strong load is applied to the rotation of the spindle 32 during the cutting work of the work material, a strong load is applied to the belt 34 to generate a force in the direction opposite to the running direction of the belt. The motor base 10 can rotate counterclockwise around the frame shaft 8 until the protruding piece 16 contacts the head portion 17a of the bolt 17, and the pipe 14 further rotates and the ear piece 15 reaches upward. By rotating up to, damage and pain of the belt 34 are prevented.

An annular flange portion 35 is provided on one end side of the spindle 32, and a threaded surface 36 is provided on the outer periphery of the tip side thereof. The spindle 32 is provided with a concentric shaft hole 37 penetrating in the longitudinal direction. An inclined portion 37 a whose inner diameter gradually increases toward the opening 38 is provided on one end side of the shaft hole 37.

The cover 40 has the first and second frame plates 2,
It is attached to the upper end of 3 by a hinge (not shown) so as to be openable and closable, and the spindle 32 projects outward from the notches 41 and 42 on both sides thereof. An L-shaped table 50 is attached to the second frame plate 3. In the center of the table 50, there is an elongated hole 5 parallel to the spindle 32.
1 is provided, and along this long hole 51, the saddle 6
0 is attached at any position and in any orientation.

That is, the long plate-shaped saddle 60 is provided with a long hole 61, the long hole 51 and the long hole 61 are aligned with each other, and a bolt 62 is provided.
A nut 63 is attached to the saddle 6 and a tightening lever 64 fixed to the head of the bolt 62 is rotated to operate the saddle 6
Fix 0. Note that 65a and 65b are spacers.

A cylindrical support member 66 is provided at one end of the saddle 60.
A columnar post 71 of a tool rest 70 is rotatably fitted into the support 66, and the post 71 is pressed by the tip of a tightening screw 68 mounted in a screw hole 67 of the support 66. By doing so, the column 71 can be fixed in any direction and at any height.

Therefore, the saddle 60 is moved along the elongated hole 51 of the table 50 and selected in an arbitrary direction, and further, the saddle 60 is moved in the direction along the elongated hole 61 of the saddle 60, and the tightening lever 64 is used. Saddle 60 table 50
Further, by fixing to the
By selecting the height of 1 and fixing it with the tightening screw 68, the tool rest 70 can be positioned at any position, height and direction.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, a third frame plate 80 is further provided in addition to the first and second frame plates 2 and 3, and these frame plates 2, 3 and 80 are parallel to each other in the horizontal direction. Pipe-shaped frame shafts 81, 8
It is fixed by 2, 83, 84.

Two upper frame shafts 81, 82
A movable body 90 is slidably attached to the. The movable body 90 is formed by connecting two substantially triangular plate bodies 91 and 92 with a vertical plate 93 and a horizontal plate 94 below the plate 93, and insertion holes 95, 95, ... The frame shafts 81 and 82 are inserted through.

Bolts 97 are inserted into the round holes 96a of the elongated plate-like tightening plates 96 on the lower sides of the frame shafts 81 and 82 from below.
Is further inserted through the screw hole of the cylindrical portion 94a of the horizontal plate 94 from below, and the tightening lever 98 fixed to the lower end of the bolt 97 is rotated to move the tightening plate 96 from below to the frame. The movable body 90 is fixed to the frame shafts 81 and 82 at arbitrary positions by pressing the shafts 81 and 82.

At the upper ends of the plate members 91 and 92, cylindrical members 100 and 101 having the same diameter are fixed so as to pass through the same axis as the spindle 32. Two cylinders 100, 1
01 with a conical portion 102a at one end
2 is slidably fitted in the axial direction.

A screw surface 1 is formed on the outer periphery of the rear portion of the center shaft 102.
02b is provided, and a ring-shaped screw ring 103 having a threaded surface 103a on the inner peripheral wall is screwed to the center shaft 102, and is positioned closely in the gap between the two cylindrical bodies 100, 101. Therefore, when the screw ring 103 is rotated, the center shaft 102 moves in either axial direction in response to this.

A screw hole is provided in the cylindrical body 100, and the center shaft 102 can be fixed by the tip of a tightening screw 104 screwed into the screw hole. Therefore, in order to hold the other end of the work piece held by one end of the spindle 32 by the center shaft 102, the moving body 90 is moved along the frame shafts 81, 82 and the tightening lever 98 is operated to tighten the tightening lever 98. The plate 96 is fixed to the frame shafts 81 and 82, the screw ring 103 is rotated, the conical portion 102a at the tip of the center shaft 102 is pressed against the other end of the workpiece, and the center shaft 102 is fixed by the tightening screw 104.

The saddle 60 abuts on the upper sides of the upper two frame shafts 81 and 82, and is fixed by tightening the tightening plate 110 from the lower side of the frame shafts 81 and 82 with the tightening lever 64. Except for the above points, the second embodiment has the same configuration as the first embodiment of FIG. As shown in FIG. 6, at one end of the spindle 32,
The face plate 120 can be attached.

That is, the face plate 120 is provided with a cylindrical portion 123 having a screw hole 122 on the back surface of the disk portion 121, and the face plate 120 is screwed into the screw surface 36 at one end of the spindle 32. Can be installed. A threaded hole 124 is provided at the center of the disk portion 121 of the face plate 120, and a screw shaft 125 can be attached to the threaded hole 124.

The workpiece W is screwed onto and attached to the screw shaft 125 of the face plate 120, the motor 20 is driven, and the spindle 32 is rotated by the belt 34 to rotate the workpiece W while the workpiece P is processed by the blade P. Figure 6 shows the opposite side of W
7, the motor 20 is stopped, the face plate 120 is removed from the spindle 32, and the inclined portion 37 of the shaft hole 37 of the spindle 32 is removed as shown in FIG.
The conical portion W1 can be pushed into and fitted into a, and the motor 20 can be driven again to rotate the spindle 32 and the workpiece W, while the workpiece W can be cut.

Further, the workpiece W can be held by pushing the claw chuck 130 shown in FIG. 8 into the inclined portion 37a of the shaft hole 37 of the spindle 32 as shown in FIG. The claw chuck 130 has a conical cylindrical shape and has a plurality of (for example, four) corrugated claws 131 at the tip thereof, and one end of the workpiece W is held by the plurality of claws 131. At the other end of W, the moving body 90 is moved along the frame shafts 81 and 82 to move the center axis 102 thereof.
Can be held at.

[0029]

As described above, in the woodworking lathe of the present invention, one end of the shaft hole of the spindle is provided with an inclination whose inner diameter gradually increases toward the opening. It is possible to fit the end processed into the inclined part at one end of the shaft hole, or to insert a frustoconical claw chuck for holding the workpiece.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention drawn in a partial cross section.

FIG. 2 is a perspective view of the embodiment.

FIG. 3 is a front view showing a mounted state of the motor in the embodiment.

FIG. 4 is a front view of another embodiment of the present invention with a partial cross section.

5 is a front view showing the main part of the embodiment of FIG.

FIG. 6 is a sectional view showing an example of use of the present invention.

FIG. 7 is a sectional view showing an example of use of the present invention.

FIG. 8 is a front view of a claw chuck.

FIG. 9 is a sectional view showing an example of use of the present invention.

[Explanation of symbols]

 2 1st frame board 3 2nd frame board 10 Motor base 16 Projection piece 17 Bolt 20 Motor 32 Spindle 37 Shaft hole 37a Inclined part 38 Opening 40 Cover 50 Table 51 Long hole 60 Saddle 64 Tightening lever 70 Turret 80 3 frame plate 81, 82, 83, 84 frame shaft 90 moving body 102 center shaft 104 tightening screw 120 face plate 124 screw shaft 127 suction hole 130 claw chuck 140 four-way chuck 150 suction plate

Claims (1)

[Claims] 1. A woodworking lathe in which a spindle having a shaft hole for suction is rotatably driven and a workpiece is rotated by the rotation of the spindle, in which one end of the shaft hole of the spindle has an inner diameter directed toward an opening. A woodworking machine that features a gradually increasing slope.