JPH0615444A - Device for supporting torch for cutting - Google Patents

Abstract

PURPOSE:To precisely incline a torch by the same angle and in the same direction while keeping core precision of a rotary center by rotating a first shaft connected with a rotary driving source by a prescribed angle. CONSTITUTION:At the time of rotating the output shaft of a motor 38 in the condition of vertically holding a first arm 32, by a prescribed angle, a second arm 34 together with the first shaft 42 are rotated in the same direction as a pulley 48 through a timing belt 50. A second shaft 52 supported with the second arm 34 is rotated in the left-turning to the second arm 34 through a timing belt 62 and also a third arm 36 is rotated to the second arm 34. A third shaft 64 is rotated in the right-turning to the third arm 36 through a timing belt 74. By this method, even if the inclined angle of the torch 26 is made to be large, the torch does not interfere with a cutting material below the torch. Further, since the keeping of precision if facilitated, the light-weight material can be used and the wt. of the device is lightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting torch supporting device capable of supporting a cutting torch used for gas cutting, plasma cutting, etc. and inclining the cutting torch by a desired angle.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are views showing a plasma cutting device in which a conventional cutting torch supporting device (hereinafter referred to as "supporting device") is used, and FIG. 6 is a cutting torch in the device. It is an enlarged view which shows the support apparatus vicinity.

In these drawings, reference numeral 2 is a cutting torch (hereinafter referred to as "torch") for generating a plasma arc from its tip portion, and 4 is a supporting device for holding the torch 2 on a revolving arm 6. The revolving arm 6 can be rotationally driven in the forward and reverse directions around the axis 10 together with the torch 2 by the torch revolving device 8, and the torch lifting device 1 is also provided.
It is possible to drive vertically up and down by 2.

As shown in FIG. 5, the supporting device 4 has a bellows 12 having a substantially fan shape, and a scale plate 14 is fixed to the surface of the bellows 12. on the other hand,
The torch holder 16 that holds the torch 2 has a connecting member 18
A pinion 22 that is connected to the drive motor 20 via a drive shaft (see FIG. 6) and is rotationally driven in the forward and reverse directions by the output shaft of the drive motor 20 is fixed to one side of the bellows 12 It is meshed with a segment gear 24 extending in the direction of. By controlling the rotational movement of the output shaft of the drive motor 20 in the forward and reverse directions, the torch 2 integrated with the torch holder 16 is tilted with respect to the bellows 12 by a predetermined angle.

[0005]

By the way, in the conventional supporting device 4 as described above, it is difficult to maintain the center accuracy of the rotation center when changing the angle of the torch 2, and the set angle can be changed. If it is increased, it has a drawback that it interferes with the cutting material located at the bottom. Further, there is a drawback that the weight of the device is large. It is an object of the present invention to provide a supporting device which can eliminate the above drawbacks.

[0006]

According to the present invention, a first arm rotatably supporting a first shaft having one end side connected to a rotary drive source and one end side fixed to the other end side of the first shaft. A second arm rotatably supporting a second shaft having an axis line parallel to the first shaft on the other end side; one end side fixed to one end side of the second shaft; A third arm that rotatably supports a third shaft whose axis is parallel to that of the two arms; a torch holder that is connected to one end of the third shaft and to which a cutting torch is attached; and a second arm of the second arm. First transmission means for converting rotational movement with respect to the first arm into rotational movement with respect to the second arm of the third arm, the directions being opposite to each other and having the same amount of rotation; and the second arm of the third arm. Rotational motion with respect to Second converting equal amount of rotation in pairs, the pivotal movement relative to the third arm of the torch holder
And a transmission means.

[0007]

In the cutting torch support device having the above structure, when the first shaft is rotated by a predetermined angle, the second arm rotates together with the first shaft, and the rotation of the second arm causes the first transmission means to move. The second shaft rotates through the same angle as the first shaft in the direction opposite to the first shaft. The third arm rotates integrally with the second shaft,
At this time, the third shaft rotates in the direction opposite to the second shaft by the same angle as the second shaft via the second transmission means. As a result, the torch holder rotates, and the torch is tilted in the same direction as the first shaft by rotating by the same angle.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. In this embodiment, the present invention is applied to a plasma cutting apparatus similar to the above-mentioned conventional example, FIG. 1 is a side view showing a supporting device of this embodiment, and FIG. 2 is a front view of the same.

In these figures, 26 is a torch similar to the torch 2 shown in the conventional example, and 28 is a swivel arm similar to the swivel arm 6 shown in the conventional example. It is freely rotatable in any direction. Further, in these drawings, 32 is a first arm, 34 is a second arm, and 36 is a third arm.

The first arm 32 is integrally connected to the revolving arm 28, the drive motor 38 is mounted and fixed on the upper side thereof, and the fixed pulley 40 is mounted on the lower end side thereof.
Is fixedly provided, and the first shaft 42 is rotatably supported via a bearing 44.

A pulley 46 is fixed to one end side of the first shaft 42, and one end side of the second arm 34 is fixedly connected to the other end side thereof. And the pulley 46
And a pulley 4 fixed to the output shaft of the drive motor 38.
The timing belt 50 is wound around the first belt 42 and the first belt 42 by the drive motor 38.

On the other end side of the second arm 34, a second shaft 52 whose axis is parallel to that of the first shaft is rotatably supported via a bearing 54, and its extending portion (see FIG. 1, a fixed pulley 56 is fixedly arranged on a portion extending upward and to the right). In addition, a tension pulley 58, which makes the axis line parallel to the first shaft 42, is rotatably supported at an intermediate portion of the second arm 34.

One end of the third arm 36 is fixedly connected to one end of the second shaft 52, and the pulley 60 is fixed to the other end. The diameter of the pulley 60 and the diameter of the pulley 40 are the same, and the modules are also set to be the same. A timing belt 62 is wound around the pulley 60, the tension pulley 58, and the pulley 40, and the shaft 42 of the second arm 34 is wound around the timing belt 62.
The second shaft 52 rotates with respect to the second arm 34 in accordance with the rotation around the axis line of. Pulley 4
0, the pulley 60, the tension pulley 58, and the timing belt 62 constitute the first transmission means.

On the other end side of the third arm 36, a third shaft 64 whose axis is parallel to that of the second shaft 52 is rotatably supported via a bearing 66. In addition, a third shaft 64 is provided at an intermediate portion of the third arm 36.
A tension pulley 68 that makes the axis parallel to the axis is rotatably supported.

Further, a torch holder 70 having an inner diameter portion to which the torch 26 is attached is provided at one end of the third shaft 64.
Is fixedly connected, and a pulley 72 is fixedly provided at a position connected to the end portion of the torch holder 70. The pulley 72 and the pulley 56 have the same diameter and the same module. And these pulleys 56,
The timing belt 74 is wound between the 72 and the tension pulley 68, so that when the third arm 36 rotates around the axis of the second shaft 52, the third shaft 64 moves relative to the third arm 36. It is designed to rotate. Pulley 56, pulley 72, tension pulley 6
8 and the timing belt 74 form a second transmission means.

The second arm 34 and the third arm 36 are in a reference state (hereinafter referred to as "reference state") in which the axis of the torch 26 is parallel to the center line of the first arm 32 in a front view. Similarly, when viewed from the front, the timing belts 62 and 74 are wound so that all the center lines are in a state of being aligned with the center line of the first arm.

Next, the operation of the supporting device having the above structure will be described with reference to FIGS. Note that FIG.
Is a simplified view of the above-mentioned supporting device, and in the figure, S indicates the surface of the workpiece to be processed.

First, when the above supporting device is used, the output shaft of the motor 38 is rotated clockwise or counterclockwise by a predetermined angle in a front view with the first arm 32 held perpendicular to the work surface S. Let As a result, the second arm 34 rotates together with the first shaft 42 in the same direction as the pulley 48 via the timing belt 50.
In FIG. 3, the second arm 34 is rotated clockwise from the reference state by an angle θ1.
The second arm 3 is shown for the sake of convenience.
The case where 4 rotates clockwise by θ1 will be described.

When the second arm 34 rotates clockwise by θ1 with respect to the first arm 32, the second shaft 52 supported by the second arm 34 passes through the timing belt 62 and the second arm 34. On the other hand, it rotates counterclockwise by θ2. Therefore, the third arm 36 also rotates with respect to the second arm 34 by θ2. At this time, the pulley 40 and the pulley 6
Since the diameter of 0 and the module are the same, θ1 and θ2
Is equal to.

Next, pay attention to the angle of inclination of the torch 26 at this time. When the third arm 36 rotates θ2 counterclockwise with respect to the second arm 34, the third shaft 64 rotates clockwise θ3 with respect to the third arm 36 via the timing belt 74. At this time, since the pulley 56 and the pulley 72 have the same diameter and the same module, θ2 and θ
Is equal to 3.

Therefore, the first shaft 42 is attached to the first arm 3
When rotated by θ1 clockwise with respect to 2, the torch 26
Will rotate clockwise by θ1 with respect to the straight line parallel to the first arm 32. Similarly, the first shaft 42
When is rotated counterclockwise by θ1 with respect to the first arm 32, the torch 26 rotates counterclockwise by θ1 with respect to a straight line parallel to the first arm 32. Further, from the above-mentioned configuration, in a front view, the third shaft 64 draws an arcuate locus having a radius r centered on a point (rotation center) P on the extension line of the first arm 32.

According to the supporting device having the above structure, the torch 26 is rotated by the same angle while maintaining the core accuracy of the rotation center by driving the motor 38 to rotate the first shaft 42 by a predetermined angle. It can be accurately tilted in the direction, and even if the tilt angle is increased, it does not interfere with the cutting material below. Furthermore, since it is easy to maintain accuracy, a lightweight material can be used, and the weight of the device can be reduced.

In the above embodiment, the timing belt is used as both the first transmission means and the second transmission means, but one or both of them may be the gear transmission mechanism.

[0023]

As described above, according to the present invention, by rotating the first shaft by a predetermined angle, the torch is rotated by the same angle while maintaining the center accuracy of the rotation center.
It can be accurately tilted in the same direction, and even if the set angle is increased, it does not interfere with the lower cutting material.
In addition, the weight of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a cutting torch support device according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a simplified diagram for explaining the operation of the cutting support device according to the embodiment.

FIG. 4 is a side view showing a plasma cutting device in which a conventional cutting torch support device is used.

FIG. 5 is a front view of the same.

FIG. 6 is an enlarged view showing the vicinity of a cutting torch support device in the same device.

[Explanation of symbols]

 26 Cutting Torch 32 First Arm 34 Second Arm 36 Third Arm 40 Fixed Pulley 42 First Shaft 52 Second Shaft 56 Fixed Pulley 58 Tension Pulley 60 Pulley 62 Timing Belt 64 Third Shaft 68 Tension Pulley 70 Torch Holder 72 Pulley 74 Timing belt

Claims (1)

[Claims] 1. A first arm rotatably supporting a first shaft, one end side of which is connected to a rotary drive source, one end side of which is fixed to the other end side of the first shaft, and the other end side of which is the first arm. A second arm having a shaft parallel to the axis and a second shaft rotatably supported, one end of which is fixed to one end of the second shaft and the other end of which has the axis parallel to the second arm. A third arm on which a third shaft is rotatably supported, a torch holder to which a cutting torch is attached, which is connected to one end of the third shaft, and a rotational movement of the second arm with respect to the first arm. Is converted into a rotational movement of the third arm with respect to the second arm having opposite directions and equal rotation amounts, and a rotational movement of the third arm with respect to the second arm. The opposite, with the same amount of rotation, Cutting torch support device being characterized in that a second transmission means for converting the rotational movement relative to the third arm of Chihoruda.