JPH0872017A - Chuck for woodworking potter's wheel - Google Patents

Abstract

PURPOSE: To perform easily holding of square lumber, by a method wherein a plurality of fixing screw holes of an axial direction and a plurality of holding screw holes of a radial direction are provided in a cylindrical annular body and the plurality of holding screw holes are fitted with holding bolts movably in a radial direction. CONSTITUTION: Four holes 125 are provided in positions of a circular plate part 121 of a face plate corresponding to screw holes 144 of an annular body 141 of a chuck 140, the four holes 125 and fitting screw holes 144 of the annular body 141 are made to coincide with each other and the chuck 140 is fixed to a face plate 120 by a screw 126. Then a blade tip of a flat blade screw driver is inserted into a groove 143a for the flat blade screw driver on the rear of a holding bolt 143 fitted with a holding screw hole 142 of the annular body 141 is turned, the holding bolt 143 is moved backward in a radius direction of the annular body 141 and an end of the square lumber (W) is held by the tips of the four holding bolts 143.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck for 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 holds a workpiece and rotates the workpiece to rotate the workpiece. Therefore, conventionally, a vacuum chuck method in which a 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 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 chuck for a woodworking lathe.

[0004]

In order to achieve the above object, in a chuck for a woodworking lathe of the present invention, a plurality of mounting screw holes in the axial direction and a plurality of holding screw holes in the radial direction are formed into a cylindrical shape. A holding bolt is provided on the ring body, and holding bolts are attached to the plurality of holding screw holes so as to be able to move forward and backward in the radial direction.

[0005]

Therefore, the ring body is attached to one end of the spindle of the woodworking wheel and the workpiece is held by the plurality of holding bolts.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a chuck for a woodworking lathe according to an embodiment of the present invention. The chuck 140 is provided with four holding screw holes 142 radially provided at intervals of 90 ° on a cylindrical ring body 141 and holding bolts 14 respectively.
3 is attached, and the ring body 141 is provided with a screw hole 144 for mounting in the axial direction.

3 and 4 show a woodworking lathe that uses the chuck 140. The first and second frame plates 2 and 3 are fixed to the upper surface of the base 1 of the woodworking machine by means of screws 4 at mounting ends 2a and 3a bent at right angles at the lower ends.

The first and second frame plates 2 and 3 are connected and fixed by pipe-shaped frame shafts 5, 6 and 7, 8 which are parallel to each other at their upper ends and intermediate portions. A plate-shaped motor base 10 is attached to the frame shafts 7 and 8. The motor 20 is fixed to the upper surface of the motor base 10 such that the drive shaft 21 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 provided on the spindle 32.
Is fixed to the pulley 33 and the motor 2
A belt 34 spans between the pulley 22 fixed to the drive shaft 21 of 0.

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 end 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 long hole 51 of the table 50 and selected in an arbitrary direction, and further, the saddle 60 is moved in the direction along the long 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 is positioned at an arbitrary position, height and direction.

5 and 6 show a woodworking lathe capable of holding both ends of a work material. In this woodworking lathe, a third frame plate 80 is provided in addition to the first and second frame plates 2 and 3, and these frame plates 2,
3 and 80 are fixed by two pipe-shaped frame shafts 81, 82, 83, 84 which are parallel to each other and which are arranged in the horizontal direction.

The upper two 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 the lower side.
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 threaded 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. The cylindrical body 100 is provided with a screw hole, 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 and 82 to operate the tightening lever 98. Then tighten plate 96
By fixing it to the frame shafts 81 and 82, rotating the screw ring 103, and pressing the conical portion 102a at the tip of the center shaft 102 against the other end of the workpiece to tighten the tightening screw 10.
At 4, the center shaft 102 is fixed.

The saddle 60 abuts on the upper sides of the upper two frame shafts 81 and 82, and is fixed by fastening the fastening plate 110 from the lower side of the frame shafts 81 and 82 with the fastening lever 64. Except for the points described above, the wheel machine of FIG. 5 has the same configuration as that of FIG. The chuck 140 of the present invention shown in FIGS. 1 and 2 is used in the above-described woodworking lathe machine as follows.

That is, as shown in FIG. 7, the face plate 120 is attached to one end of the spindle 32 of the woodworking lathe. The face plate 120 includes a cylindrical portion 123 having a screw hole 122 on the back surface of the disc portion 121, and the face plate 120 is attached by screwing the screw hole 122 onto the screw surface 36 at one end of the spindle 32.

In the disc portion 121 of the face plate 120, the mounting screw hole 14 of the ring body 141 of the chuck 140 is attached.
4 holes 125 are provided at positions corresponding to 4,
The four holes 125 are aligned with the mounting screw holes 144 of the ring body 141, and the chuck 140 is fixed to the face plate 120 with the screws 126.

Then, for example, one end of the workpiece W having a quadrangular cross section is inserted into the slot 143a for a minus driver on the rear end surface of the four holding bolts 143, and the tip of the holding bolt 143 is rotated by inserting the blade tip of the driver. To hold.
Note that a pad 145 may be provided at the tip of the holding bolt 143 as in step 2. When the workpiece W is a long square bar, the other end of the workpiece W is held by the center shaft 102 of the moving body 90 using the woodworking lathe shown in FIG.

[0025]

As described above, in the chuck for a woodworking lathe of the present invention, a plurality of mounting screw holes in the axial direction and a plurality of holding screw holes in the radial direction are provided in a cylindrical ring body, and Since holding bolts are attached to multiple holding screw holes so that they can be moved forward and backward in the radial direction, a ring body should be attached to one end of the spindle of the woodworking lathe and the work piece should be held with multiple holding bolts. This makes it easy to hold the timber.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view of the same embodiment with a partial cross section.

FIG. 3 is a front view of a woodworking potter's wheel in which the chuck of the present invention is used, in a partial cross section.

FIG. 4 is a perspective view of FIG.

FIG. 5 is a front view showing another example of a woodworking potter's wheel with a partial cross section.

6 is a perspective view of a main part of FIG.

FIG. 7 is a sectional view showing a method of using the present invention.

[Explanation of symbols]

 2 1st frame board 3 2nd frame board 10 Motor base 16 Projecting piece 17 Bolt 20 Motor 32 Spindle 37 Shaft hole 70 Turret 80 Third frame board 81, 82, 83, 84 Frame shaft 90 Moving body 102 Center Axis 140 chuck

Claims (1)

[Claims] 1. A holding bolt for mounting a plurality of mounting screw holes in the axial direction and a plurality of holding screw holes in the radial direction on a cylindrical ring body so as to be able to advance and retreat in the radial direction in the plurality of holding screw holes. Chuck for woodworking potter's wheel equipped with.