JPH0144527Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The invention is designed to provide traverse (reciprocating) motion to a driven body that engages with the cam groove of a three-dimensional cam in, for example, a precision bobbin winder for a covering machine and other various machines. The present invention relates to a traverse device.

<Prior Art> In a conventional traverse device of this type, for example, one cam roller of a driven body is attached to a cam groove of a three-dimensional cam, so that the driven body makes a traverse motion parallel to the generatrix of the three-dimensional cam.

<Problems to be solved by the invention> In the conventional traverse device described above, the cam roller contacts the wall surface of the cam groove of the three-dimensional cam and moves along the cam groove while rotating. Or, since the rotation of the cam roller is reversed at each point where the return path changes to the outbound path, the cam roller causes non-contact play in the cam groove at this conversion point.
Not only is it difficult to achieve smooth traverse motion and high speed, but there are also drawbacks such as wear of the corner portions of the cam grooves.

This idea was made in view of the above circumstances.
It is an object of the present invention to provide a traverse device in which the traverse motion of a driven body can be made smooth and at high speed, and the traverse motion can be achieved quietly without wear at the corners of a cam groove.

<Means for Solving the Problems> A traverse device according to the present invention is a traverse device in which a driven body that engages with a cam groove formed on the surface of a three-dimensional cam performs a traverse motion parallel to the generatrix of the three-dimensional cam. The driven body is equipped with a pair of rotating rollers separated from each other at a predetermined interval, and one rotating roller is in contact with one side wall of the cam groove, and the other rotating roller is in contact with the other side wall of the cam groove. It is.

<Operation> Each of a pair of rotating rollers is in contact with one side wall of the cam groove in the cam groove of the three-dimensional cam, and as the three-dimensional cam rotates, one of the rotating rollers moves clockwise or counterclockwise. The other rotating roller rotates counterclockwise or clockwise, respectively.
Even when the driven body changes from the forward path to the return path or from the backward path to the forward path, each of the pair of rotating rollers is always in contact with one side wall of the cam groove and rotates in the same direction.

<Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to the drawings, taking a precision bobbin winder for a covering machine as an example. Reference numeral 1 indicates a pinion gear coaxially connected to the drive unit 2, and reference numerals 3 and 4 indicate a differential gear and a cam gear that mesh with the pinion gear, respectively. The differential gear 3 and the cam gear 4 are mounted coaxially with the three-dimensional cam 5, and the rotation of both gears 3 and 4 causes the three-dimensional cam 5 to rotate. Further, the number of teeth of the cam gear 4 is greater than that of the differential gear 3, and the cam gear 4 moves at any time along the axial direction so that the thread is evenly wound around the bobbin (not shown). I have to. The three-dimensional cam 5 has a columnar or cylindrical shape, and an endless cam groove 7 is provided on its surface so that the driven body 6 can perform traverse (reciprocating) motion. Reference numeral 6 denotes a driven body that performs a traverse motion, and this driven body includes a pair of cam rollers 9 attached so as to be in contact with both side walls 7a, 7a of the cam groove 7, and the pair of cam rollers 9.
The slider 10 includes a slider 10 to which the cam rollers are attached so that the mutual distance between them can be changed as appropriate, and a slide shaft 11 that serves as a guide for the slider to make a horizontal traverse movement.
As shown in FIG. 4a, the cam roller 9 is attached via a washer 9c to a pin 9b which projects laterally from a position eccentric from the center of one side of the stationary platen 9a in a caulked state. A bolt-shaped pin 9d protruding from the center of the other side of the fixed platen 9a passes through the through hole 10a of the slider 10, and its end is fastened with a nut 12, and the head of the pin 9d has a A position adjustment groove 9e is formed so that the cam roller 9 can come into contact with the side wall 7a of the cam groove 7. Figure 4b
The cam roller 9 is rotated by the position adjustment groove 9e.
shows a state where it is in contact with the side wall 7a of the cam groove 7.

The operating state of the traverse device having the above configuration will be explained based on the cam diagram shown in FIG. 3. While the three-dimensional cam 5 rotates from 0° to 360°, that is, one rotation, the pair of cam rollers 9, 9 constantly rotate the respective side walls 7 of the cam groove 7.
a, 7a, and in a series of steps, for example, from 0° to 180° on the outward journey, around 180°, the conversion point from the end point of the outward journey to the start point of the return journey, and from 180° to 360° on the return journey, Each cam roller 9, 9 will rotate in one direction.

<Effects of the Invention> As can be seen from the above description, the present invention provides a traverse device in which a driven body that engages with a cam groove formed on the surface of a three-dimensional cam makes a traverse motion parallel to the generatrix of the three-dimensional cam. is equipped with a pair of rotating rollers separated from each other at a predetermined interval, and one rotating roller is brought into contact with one side wall of the cam groove, and the other rotating roller is brought into contact with the other side wall of the cam groove. Each of the pair of rotating rollers in the body constantly rotates in one direction while contacting the side wall in one direction of the cam groove, allowing smooth traverse movement of the driven body and increasing speed. becomes. Moreover, the wear of the cam roller at the corners of the cam groove is eliminated, resulting in an excellent effect of obtaining quiet motion.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Fig. 2 is a front view showing the positional relationship between the three-dimensional cam and the cam roller, Fig. 3 is a cam line diagram, Fig. 4a is a sectional view of the cam roller, and Fig. 4b is a cam groove by adjusting the position of the cam roller. FIG. 3 is a plan view showing a state in which it is in contact with a wall surface. 5... Three-dimensional cam, 6... Follower, 7... Cam groove, 7a... Side wall, 9... Cam roller.

Claims (1)

[Scope of utility model registration request] In a traverse device in which a driven body that engages with a cam groove formed on a surface of a three-dimensional cam performs a traverse motion parallel to a generatrix of the three-dimensional cam, the driven body includes a pair of rotating rollers that are separated from each other at a predetermined interval. A traverse device characterized in that one rotating roller is brought into contact with one side wall of the cam groove, and the other rotating roller is brought into contact with the other side wall of the cam groove.