JPS6113176Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that adjusts only the angle of a welding torch without changing its aiming position.

A conventional device of this type is shown in FIG. In the figure, 1 is a fixed main body, 2 and 3 are pins fixed to this main body at intervals, 4 and 5 are rotating links that rotate around these pins 2 and 3, respectively, and 6 and 7 are each this A pin fixed between the rotary links 4 and 5, 8 a connecting link connecting the pins 6 and 7, 9 and 10 pins fixed at the ends of the rotary links 4 and 5, respectively, and 11 a pin 9. , 10, 12 and 13 are pins fixed to the extended ends of the connecting links 8 and 11, respectively, and 14 is the pin 12,
This is a link connecting 13.

In the above link mechanism, pins 2 and 3, pins 6 and 7, and pins 9 and 10 are the same length, pins 2 and 6 and pins 3 and 7 are the same length, and pins 6 and 9 are the same length.
The length between the pins 7 and 10 and between the pins 12 and 13 is set to be the same, and the length between the pins 7 and 12 and between the pins 10 and 13 is set to be the same length, thereby forming a parallel crank link as a whole. and a welding torch (not shown)
is provided on the link 14 so as to aim at the rotation axis 15 thereof.

In the device configured as described above, when the rotary link 4 and/or the rotary link 5 are rotated by a drive motor (not shown), the link 14 rotates in parallel with the rotary links 4 and 5 in the same phase. The rotating shaft 15 is located at the intersection of the extended line of the pins 2 and 3 and the extended line of the link 14, that is, at a point on the extended line of the pins 2 and 3 from the pin 3 on the opposite side of the pin 2 at a certain distance A. Therefore, by always aiming the welding torch mounted on the link 14 at the rotating shaft 15, the inclination angle θ of the welding torch with respect to the main body 1 can be adjusted without changing the aiming position due to rotation.

Since the conventional welding torch angle adjustment device is constructed as described above, when θ is O, the links are aligned in a straight line as shown in FIG.
At this time, there is a slight gap between each pin and each link, so if uneven loads, moments, etc. are applied to the link 14 that holds the welding torch, the links will not line up in a straight line, and eventually There is a risk that the rotational movement of the link mechanism may be locked and the link mechanism may become unable to rotate, which has the disadvantage that the range of use of this device is limited.

This invention was made in order to eliminate the drawbacks of the conventional crank links as described above.It was made to eliminate the drawbacks of the conventional crank links, and even when the conventional parallel crank links are aligned in a straight line, It is an object of the present invention to provide a welding torch angle adjustment device that can smoothly rotate the link mechanism by adding another link mechanism forming a quadrilateral.

An embodiment of this invention will be described below with reference to the drawings. FIG. 3 shows an embodiment of this invention, in which an auxiliary parallel crank link is added to the device of FIG. 1. In the figure, 1 to 15 are the same as those in FIG. 1, 4a is a rotary link that is integrally configured to rotate around pin 2 with a constant phase difference with rotary link 4, and 5a 16 and 17 are pins fixed to the tips of the rotation links 4a and 5a, respectively. It is a connecting link that connects pins 16 and 17, and between pins 2 and 3 and between pins 16 and 17.
The length between pins 2 and 16 is the same as that between pins 3 and 17.

The rotating links 4a, 5a, pins 16, 17, and articulating link 18 constitute an auxiliary parallel crank link, thereby forming a double parallel crank link consisting of two parallel crank links that rotate with a constant phase difference as a whole. has been done. As in the case of FIG. 1, the welding torch is provided on the link 14 and is aimed at the rotation axis 15 thereof.

In the device configured in this manner, when the rotating links 4, 4a and/or the rotating links 5, 5a are rotated, the parallel crank links corresponding to FIG. 1 perform the same operation as in FIG. 1. Therefore, the welding torch mounted on the link 14 is always connected to the rotation axis 15.
Therefore, the inclination angle θ of the welding torch with respect to the main body 1 can be adjusted without changing the aiming position by rotation.

One side rotating links 4, 5 and connecting links 8, 1
The parallel crank link constituted by 1 and the auxiliary parallel crank link constituted by rotating links 4a, 5a and articulating link 18 rotate with a constant phase difference. Therefore, even if the parallel crank links constituted by the rotating links 4 and 5 and the connecting links 8 and 11 on which the welding torch is mounted are aligned, the auxiliary cranks constituted by the rotating links 4a and 5a and the connecting links 18 The parallel crank links of form a parallel link.
Therefore, the driving power is applied to the rotating link 4a or 5a forming the parallel link, and it is possible to prevent uneven moments from acting on the rotating links that overlap in a straight line. The operation is also stable.

Note that the rotary links do not have to be integrally configured, and may be configured to rotate with a constant phase difference by connecting separate rotary links with a connecting link.

As described above, according to this invention, two parallel crank links are connected to form a double parallel crank link, so no matter what the angle of inclination of the welding torch with respect to the main body, the welding torch can be stably operated. It can be rotated and has the effect of smoothly adjusting only the angle without changing the aiming position.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional angle adjustment device of a welding device, Fig. 2 is a front view showing a state in which the links of the device shown in Fig. 1 are aligned, and Fig. 3 is a front view showing an embodiment of this invention. FIG. In the figure, 1 is the main body, 2, 3, 6, 7, 9, 1
0, 12, 13, 16, 17 are pins, 4, 4a,
5 and 5a are rotating links, 8, 11 and 18 are connecting links, and 15 is a rotating shaft. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) Two rotating links that rotate around two pins that are fixed at an interval, and a first link that connects the pin that is fixed in the middle of these rotating links. An articulating link, which connects a pin fixed to the tips of the two rotating links, and a pin fixed to the extended ends of the first and second articulating links, and aims at the axis of rotation thereof. A parallel crank link consisting of a link on which a welding torch is mounted, two rotating links that rotate with a constant phase difference from the two rotating links, and a pin fixed to the tip of the rotating link. An angle adjusting device for a welding torch, comprising an auxiliary parallel crank link constituted by an articulated link that connects the welding torch. (2) The welding according to claim 1 of the utility model registration claim, characterized in that two rotating links rotating with a constant phase difference are integrally constructed or connected by a connecting link. Torch angle adjustment device.