JPS5868482A - Magnification device - Google Patents

Abstract

PURPOSE:To obtain large driving force and to permit controlling of speed in conformity with the speed of the hand or the foot, by sliding a revolving shaft thereby changing the contact state between a disc for transmission of driving power and two sheets of discs rotated by a motor. CONSTITUTION:When a revolving shaft 15 is slided by a pedal 22 for treading, a revolving shaft 15 rotates in the direction in contact with rotary discs 10, 11 in respective directions, and screw shafts 4 rotate. When the shafts 4 move downward, a magnification output shaft 30 is moved downward together with a moving table 2. Thereupon the disc 11 is moved in the direction spacing from a disc 14 for transmission of driving power; therefore the shaft 30 keeps exerting the force for sliding the shaft 15 in a downward direction upon said shaft. More specifically, the table 2 moves according to the extent of treading of the pedal 22 and the table 2 moves at the speed corresponding to the treading speed.

Description

[Detailed Description of the Invention] The present invention relates to a double-blade device for moving parts of press machines, resistance welding machines, etc. that need to be operated with a large amount of power by doubling the human power applied through the feet or hands. .

In this type of booster, the foot type and manual pressure type, which transmit force by direct foot pressure or hand force, have the disadvantage of having a limit to the pressure force and tiring the operator. there were.

In addition, the pneumatic type uses compressed air pressure, which uses a cylinder and piston, and can obtain a larger pressing force than the foot-operated type or manual pressure type, but the speed and pressure during the stroke are large. The drawback was that it was not possible to adjust the speed, and only the overall speed could be adjusted.

The purpose of the present invention is to eliminate these conventional drawbacks, and to make it possible to obtain a large driving force, as well as to be able to stop mid-stroke and adjust the speed to match the speed of the hands and feet. That is.

In order to achieve this object, in the present invention, a rotating shaft for rotating the screw shaft is disposed on a movable table having a screw shaft screwed into the screw portion of the fixed table and a boost output shaft, and The rotary shaft is provided with a driving force transmitting disc that is arranged so as to be slidable in the axial direction between two rotary discs that are rotated by a motor in opposite directions. By sliding, the contact state between the driving force transmitting disk and the two rotating disks rotated by the motor is changed, and the driving force is increased by the force of the motor. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained below using the drawings of FIG. 1 and FIG. 2.

In the figure, 1 is a fixed base, and 2 is a threaded part 3 of this fixed base 1.
The movable base 2 is guided by a guide shaft 6 fixed to the fixed base 1 and moves up and down.

The screw shaft 4 also has a bearing 6 fixed to the movable table 2.
is rotatably supported by the pulley 7.
is fixed. 8 is a motor with two pulleys 9 attached to the drive shaft; 10 and 11 are rotary disks rotatably supported on the excitation moving table 2 by bearings 12; are connected to the pulley 9 by a belt 13 so as to rotate in opposite directions.

Reference numeral 14 denotes a driving force transmitting disk disposed between the rotary disks 10 and 11, and the driving force transmitting disk 14 is fixed to a rotating shaft 15 that is slidable in the axial direction to transmit the driving force. The disk 14 slides in the axial direction of the rotating shaft 16, and the rotating disk 1
0.11, the rotation of the rotating disk on the contacting side is transmitted to the driving force transmitting disk 14, and the rotating shaft 16 is rotated. In addition, this rotating shaft 1
A pulley 17 is fixed to the end of the pulley 7 via a belt 16 so as to be able to transmit rotational power to the pulley 7. Rotation of the rotating shaft 15 causes the pulleys to rotate in the same direction and at the same speed. do.

Reference numeral 18 denotes a foot arm rotatably supported and attached to a fixed arm 19 attached to the fixed base 1;
A connecting bar 21 connected to the rotating shaft 16 via a spring 20 is connected to one end of the rotating shaft 8, and a foot pedal 22 is attached to the other end. 23 is this foot arm 18
The return spring 24 is turned on by this foot arm 18,
This is a limit switch that is operated to turn off. That is, when the rotating shaft 15 is slid by the foot pedal 22, the start-up control of the motor 8 is performed.

The Rad section 26 includes a fixed block 26 fixed to the fixed base 1 and a lower electrode 2 attached to the fixed block 26.
7, an upper electrode 29 attached to an upper pressurizing moving arm 28 which is arranged to butt against the lower electrode 27 and can slide up and down, and a boost output shaft 3 connected to the moving table 2.
0, and a pressure spring 32 interposed between the upper pressure moving arm 28 and urging the upper pressure moving arm 28 downward. There is.

In the booster having such a configuration, as shown in FIG.
+ force direction. Reversing the direction of rotation in this way is done by changing the way the belt 13 is applied.

Then, the rotating shaft 16 is &2. When sliding together with the driving force transmitting disc 14 in the b2 direction, the rotating shaft 16 rotates in a direction tangent to the rotating discs 10, 11 in the respective directions, and the screw shaft 4 rotates in &5. This results in a rotation of 6 - in the b5 direction.

For example, the screw shaft 4 rotates in the b3 direction, and the screw shaft 4 rotates in the b4 direction.
When the boost output shaft 30 moves in the direction b4, the boost output shaft 30 moves together with the moving table 2 in the b4 direction. At this time, as the movable table 2 moves in the b4 direction, the driving force transmitting disk 14 and the rotating disk 11 that are in contact with each other move in a direction in which the rotating disk 11 moves away from the driving force transmitting disk 14. In order to move, a force is applied to the rotating shaft 15 to cause it to slide in the b2 direction until the boost output shaft 3° moves to a predetermined position. That is,
The movable platform 2 moves according to the operating force applied to the foot arm 18 that operates the connecting bar 21 connected to the rotating shaft 16, that is, the amount of depression of the foot pedal 22, and moves at a speed corresponding to the depression speed. The table 2 moves. Of course, A4
The same applies when moving in the direction.

As described above, according to the booster of the present invention, it is possible to adjust the moving direction, displacement amount, and speed of the boost output shaft according to the operating force and direction of sliding the rotating shaft, and also to generate a large output. to get

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a booster according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the main structure of the device. 1...Fixed stand, 2...Moveable stand, 3...
...Threaded part, 4...Screw shaft, End, 17...
...Pulley, 8...Motor, 10.11.
...Rotating disk, 13.16...Belt,
14... Drive force transmission disc, 16...
Rotating shaft, 3o... Boost output shaft. Name of agent: Patent attorney Toshio Nakao and 1 other person Vehicle 1
Figure 2

Claims (1)

[Claims] A movable base having a screw shaft and a boost output shaft that are screwed into the threaded portion of the fixed base, and two rotating discs that are rotatably attached to the movable base and rotated in opposite directions by a motor. and a rotating shaft for rotating the screw shaft, the drive force transmitting disk being disposed so as to be slidable in the axial direction between the rotating disks.