JPS6038612Y2 - Self-aligning guide roller - Google Patents

Description

[Detailed description of the invention] The present invention relates to a self-aligning guide roller, and more specifically, it automatically adjusts the relative position of the guide roller to the feeding trajectory of the waist-guided member in response to changes in the outer diameter of the guided member. Regarding the self-aligning guide roller that follows the target.

Conventionally, the self-aligning guide rollers shown in Figs.
The one shown in the figure is known.

This self-aligning guide roller has a guide member 3 on which a pair of pieces 2, 2 are movably attached to a post 1 which is set upright, and a threaded rod 5 with a bundle 4 attached to one end of the guide member 3. The pair is rotatably mounted and screwed into each piece 2 with threads in different directions formed on a screw rod 5, and a V-shaped guide groove 6 is formed on the outer peripheral surface of each piece 2. The guide roller 7゜7 is connected to the shaft 8
, 8, and by rotating the bundle 4 in an appropriate direction, each guide roll 7 can be moved toward and away from each other without changing the center position between the guide rolls 7, and the guided The spacing between the guide grooves 6 can be adjusted in response to changes in the outer diameter of the member 9.

However, in the conventional self-aligning guide roller described above, the minimum diameter D1 of the guided member 9 that can be guided is:
As shown in FIG. 3, the diameter of the inscribed circle for each guide groove 6 when the outer peripheries of the pair of guide rollers 7 are in contact becomes the limit, and the angle of each guide groove 6 in this case is 9
0' and its groove width is A, the minimum diameter D1 of the guided member 9 is D, = A/j2.

Furthermore, as shown in FIG. 4, if the maximum diameter D2 of the guided member 9 that can be guided is greater than or equal to D2=J2A, the engagement dimension H between the guided member 9 and each guide groove 6 becomes smaller, and the guided member 9 becomes smaller. The member 9 easily comes off from the guide groove 6 and cannot maintain its guiding function.

Therefore, the range in which the guided member 9 can be guided by the conventional self-aligning guide roller is when the V-shaped guide groove 6 of the guide roller 7 has an angle of 90° and a groove width of A. In this case, A/&D<D</2A.

The present invention was devised in view of the above-mentioned problems, and its purpose is to automatically make the pair of guide rollers follow changes in the external dimensions of the guided member, and to To provide a self-aligning guide roller capable of guiding even a guided member having a diameter smaller than the diameter of an inscribed circle inscribed in a space surrounded by a guide groove of the roller.

Hereinafter, one embodiment of this invention will be described in detail using the drawings from FIG. 5 onwards.

5 and 6 are a front view and a side view of a self-aligning guide roller 10 according to the present invention, in which a rectangular rotating piece 12 is attached to a pivot shaft 13 at the end of a plate-shaped post 11. It is rotatably mounted through the

The rotating piece 12 is always moved in one direction (counterclockwise in FIG. A rotational force is applied (rotation biased) in the direction (direction), and the rotation is regulated by a stopper 15 implanted in the post 11.

Note that the pivot 13 is provided to be located in the material feeding locus of a guided member 16 having a circular cross section, such as a tube or a wire, and the stopper 15 is provided as a guide member attached to the rotating piece 12 as described later. A line connecting the centers of rotation of the guide rollers forming the guide roller contacts the rotating piece 12 at a position perpendicular to the material feeding trajectory of the guided member 16 (in the left-right direction in FIG. 5) to restrict its rotation. This is what is being done.

A pair of support shafts 17.17 are implanted in the pivot piece 12 on a straight line passing through the pivot shaft 13 and at positions equidistant from the pivot shaft 13, and each support shaft 17 has the following: V on the outer surface
Guide rollers 19 each having a letter-shaped guide groove 18 are rotatably mounted thereon.

Note that the interval between each guide roller 19 is determined by the guide groove 18.
The guide members 16 are spaced apart enough to engage a guided member 16 having a maximum outer diameter that can be guided according to the groove width.

With the above configuration, this self-aligning guide roller 10
The operation when guiding the guided member 16 will be explained.

First, when guiding the guided member 16 having the maximum outer diameter that can be guided by this self-aligning guide roller,
As shown in FIG.
The rotary piece 12, which is perpendicular to the material feeding trajectory of the guide rollers 19, is rotated counterclockwise in FIG. 5 against the biasing force of the bullet 14, and Its rotation is regulated by.

Next, as the outer diameter of the guided member 16 becomes smaller, the rotating piece 12 equipped with each guide roller 19 becomes smaller.
is rotated clockwise in FIG. 5 by the rotational biasing force of the ammunition 14.

Therefore, the line connecting the support shafts 17 of each guide roller 19 obliquely intersects the material feeding trajectory of the guided member 16,
The interval between each guide roller 19 with respect to the material feeding trajectory of the guided member 16 is automatically adjusted in response to a change in the outer diameter dimension of the guided member 16.

Note that the intermediate point of each guide roller, that is, the position corresponding to the material feeding trajectory of the guided member 19, does not change because the rotating piece 12 to which each guide roller 19 is attached rotates around the pivot shaft 13. .

Furthermore, the outer diameter dimension of the guided member 16 is as shown in FIGS. 7 and 8.
As shown in the figure, when the diameter becomes smaller than the diameter of the inscribed circle inscribed in the space surrounded by the guide groove 18 of each guide roller 19, the rotating piece 12 is further rotated and the outer peripheral portion of each guide roller 19 is is moved downward or upward beyond the material feeding trajectory of the guided member 16, but the guided member 16 is smoothly guided while being held by each guide $18.

As described above, the present invention provides a structure in which a rotating piece is rotatably attached to a post by a pivot, and this rotating piece is biased to rotate in one direction by an elastic force, and the rotating piece has a guide groove.
Since a pair of guide rollers are rotatably mounted via a support shaft provided at the same distance from the pivot, the guide rollers can automatically follow changes in the outer diameter of the guided member. In addition, it is possible to guide a guided member having a smaller diameter than the diameter of the inscribed circle inscribed in the space surrounded by the guide groove of each guide roller.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional self-aligning guide roller.
Fig. 2 is a partially sectional side view, Figs. 3 and 4 are explanatory views of the conventional self-aligning guide roller, and Fig. 5 is a self-aligning guide roller according to the present invention. FIG. 6 is a front view, FIG. 6 is a side view, and FIGS. 7 and 8 are a front view and a side view showing the function of the self-aligning guide roller according to the present invention. 1 1... Post, 12... Rotating piece, 13... Pivot, 14... Bombshell, 17... Support shaft, 18... Guide groove, 19... Guide roller.

Claims (1)

[Scope of utility model registration request] A rotating piece 12 is rotatably attached to a post 11 by a pivot 13, and this rotating piece 12 is biased to rotate in one direction by a bullet 14. A self-aligning guide roller characterized in that a guide roller 19 is rotatably mounted via a support shaft 17 degrees 17 provided at an equal distance from the pivot shaft 13.