JP2001334512A - Thyristor-controlled potter's wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate problems such that although there are manual type and electrically operated type potter's wheels for a hobby, and in the electrically operated potter's wheel, the turntable needs to be rotated at an extremely low speed in a forming work in many cases, but by a speed-adjusting method with a ring cone which is normally used at the present time, the noises of a motor and a mechanical vibration are high, and also, the rotation of the potter's wheel stops when the speed is lowered, and the complicated forming work is made difficult. SOLUTION: In stead of the ring cone method, a rotating power-transmitting mechanism by a V pulley is introduced, and the capacity of a housing of the potter's wheel is made smaller. Also, by providing an RC motor by the thyristor control method, noises by the motor rotation is made lower, and also, the mechanical vibration due to the motor is reduced. Thus, even in a general household, the forming work can be performed without applying a noise pollution to the neighbors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a small electric potter's wheel used when a clay, which is a material for producing ceramics, is formed into a desired shape.

[0002]

2. Description of the Related Art As disclosed in JP-A-1-224804, JP-A-6-17902, JP-A-6-27109 or JP-A-8-90524, a transmission or a thyristor mostly using a ring cone is disclosed. A method of adjusting the rotation of the wheel by changing the rotation angle of the wheel has been used. However, in the former three ring cone systems, the size of the apparatus is large, and the modeling work of the operator is easily hindered, and in the latter, the circuit and mechanism are too complicated.

[0003]

In a ring cone type potter's wheel, a rotary table is structured to be connected to a driving device housed in a cylindrical case having a relatively large diameter. Due to the arrangement, the volume is large, and it is often inconvenient to work between the two feet of the worker, and if the driving device etc. is too light and small, the center of gravity will shift to the upper side. However, when a large amount of clay lump is placed on a rotary table, it becomes unstable and may hinder the work. Further, it is difficult to maintain the conventional wheel at a low speed, and it has been difficult to perform a complicated forming operation.

[0004]

The housing of the drive motor is formed in a box shape whose cross-sectional area is reduced upward or a cylindrical shape which is tapered upward, and the center of gravity is further lowered. The rotating table rotates smoothly with less vibration, improves workability, and adopts a thyristor control system equipped with an inverter motor as a driving method of the table so that it can rotate smoothly even at low speed. I got it.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A V-pulley is directly connected to a turntable shaft, a small pulley is connected via a V-belt, an inverter motor is directly connected to the small pulley shaft, and a foot pedal is provided outside the wheel housing. And a handle interlocked therewith.

[0006] When a heavy clay mass is formed on a turntable, a large rotating force is required, but when a small object is formed, a relatively low rotating force is required. Therefore, an inverter motor constituting a potter's wheel is required. Can be directly connected to the shaft of the turntable without passing through a pulley.

[0007]

EXAMPLE A light metal casting turntable 11 having a diameter of 300 mm and a plastic mudguard cover with a width 48 are provided.
In a main body of a wheel having a length of 0 mm, a depth of 595 mm, and a height of 485 mm, a V pulley 21 is directly connected to the shaft 12 of the turntable via a flange 13, and a support plate suspended from the upper surface of the wheel through a V belt 23. A small pulley 22 is provided above, a thyristor-controlled 100 V, 400 W RC motor 31 is attached to the axis of the small pulley, and a foot pedal 42 and a switching handle lever 41 are provided on the right foot side.
Is provided.

It is also possible to lengthen the axis of the turntable to lower the center of gravity of the entire apparatus, and to directly connect a thyristor-controlled inverter motor without using a pulley.

[0009]

In a conventional turntable wheel having a diameter of 300 mm, electric power of 100 V and 250 W was used. However, when the power is set to 100 V and 400 W, it operates smoothly from low speed to high speed rotation. And
In addition, there is a feature that unnecessary vibration does not occur in switching the speed.

In the conventional ring cone system, 46
Although horn-level noise was generated, according to the present invention, the horn became 37 horns, which made it less harsh and less polluting even when used in a general household.

In a conventional potter's wheel, the rotation of the turntable is stopped by the motor torque when the speed is set to the low speed in the earth-moving stage. However, the present invention is characterized in that the turntable can be rotated to a very low speed. Also have.

Compared to a conventional wheel, it has features that vibration during rotation is extremely small and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a wheel according to the present invention.

FIG. 2 is a view showing a schematic structure of a wheel when a V pulley according to the present invention is interposed.

FIG. 3 is a diagram showing a schematic structure of a wheel when a turntable and an RC motor according to the present invention are directly connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Turntable 12 Axis 13 Flange 21 V pulley 22 Small pulley 23 V belt 31 RC motor 41 Lever 42 Pedal

Claims (2)

[Claims] 1. A potter's wheel for controlling a thyristor, wherein a low speed rotation of a turntable can be smoothly performed by using a driving motor whose rotation speed can be adjusted by thyristor control. 2. A potter's wheel according to claim 1, wherein a pulley is interposed between a shaft of the turntable and a driving motor.