JPH0130457Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a selvedge mechanism in a yarn winding device.

(Prior art) In order to respond quickly to higher speeds of looms and to improve the unwinding properties of yarn, it is common practice to selvage the yarn when winding it in a biconical type, parallel type, etc. However, at present, a means using an eccentric cam is generally employed as such an ear-clamping mechanism.

As shown in FIG. 7, the mechanism using this eccentric cam includes a touch roll 4 in contact with a cylindrical eccentric cam 1', a link mechanism 9 and a connecting rod 5.
The movement of the cam is transmitted into the cam box 6 through the cam box 6 to give the required traverse to the thread guide 7, while the bobbin is attached to the tip of the cradle arm 8 in contact with the drum 10 for winding. The mechanism is simple and highly reliable, as it is based on varying the traverse width of the thread guide using the amount of change.

However, in this mechanism, the amount of eccentricity is determined by the cam, so the amount of traverse is always constant unless the cam is changed.If you want to change the traverse width, you have to replace the eccentric cam with another cam with a different amount of eccentricity. , modification or adjustment such as changing the moment ratio of the link mechanism becomes necessary.

This leaves problems in adapting to winding conditions, such as differences in denier or different winding conditions such as hard winding and soft winding. It appears that it can only be used under certain conditions.

(Problems to be solved by the invention) The present invention addresses and improves the shortcomings of the conventional ear-closing mechanism as described above, and focuses on the eccentric cam mechanism in particular to solve the problem under various winding conditions. It is an object of the present invention to make it possible to set the optimum ear-tip amount over a wide range.

(Means for Solving the Problems) That is, the feature of the present invention is that in the selvedge mechanism of the winding device, the eccentric cam for shaving the selvage is configured to be inclined with respect to the axial direction. In addition, the eccentric cam is further movable in the axial direction, and by moving the eccentric cam, a continuously different amount of eccentricity is applied to the member corresponding to the eccentric cam.

Here, the inclination angle of the eccentric cam with respect to the axial direction can be set as appropriate, and is selected in consideration of each winding condition.

Also, the amount of axial displacement of the eccentric cam is set in relation to the sleeve fixed to the drive shaft, but it is 0.
~40mm is sufficient for practical purposes. but,
Of course, it goes without saying that you are not bound by this.

(Function) As described above, when the cam is tilted in the axial direction and is movable, when the cam rotates, the tatsuchi roll in contact with the outer periphery of the eccentric cam has an outer periphery parallel to the axial direction. Unlike the case of an eccentric cam, it is possible to adjust the eccentricity in the vertical direction by varying the amount of eccentricity by the difference in diameter corresponding to the inclination depending on the contact position, and also to continuously change the amount of eccentricity with respect to the Tatsuchi roll by moving in the axial direction. And it can be adjusted steplessly.

(Embodiments) Hereinafter, embodiments of the present invention will be described with further reference to the accompanying drawings.

1 and 2 show an example of an eccentric cam in the device of the present invention, and FIG. 3 is an enlarged view thereof. Note that the other thread guides, cam boxes, cradle arms, etc. may be the same as those of the device shown in FIG. 7, and therefore, these parts will be omitted.

In FIGS. 1 to 3 above, 1 is a cylindrical eccentric cam, and the eccentric cam 1 is fitted onto the outer periphery of a flanged sleeve 2 fixed to the outer periphery of the shaft 3 so as to be movable in the axial direction. has an inclination in the axial direction with respect to the shaft 3.

A touch roll 3 is in contact with the outer periphery of the eccentric cam 1, as in FIG. 7, so that changes in eccentricity caused by rotation of the shaft 3 are transmitted to the connecting rod 5 via the link mechanism 9.

Note that l shown in FIG. 4 is the eccentricity of the tatsuchi roll 4 that is in contact with the outer periphery of the eccentric cam 1 when the shaft rotates, and although it is relatively small in the case of FIG. Eccentric cam 1 as shown in the diagram
is larger than that in FIG. 1 when it moves on sleeve 2.

That is, as shown in FIG. 3, as the eccentric cam 1 moves in the axial direction with respect to the tutti roll 4, the eccentricity l with respect to the tutti roll 4 changes, and based on this, the amount of change in the traverse width of the thread guide is continuously and Adjustment is possible steplessly.

5 and 6 show the relationship between the amount of eccentric cam movement and the amount of eccentricity in the above case, as well as the displacement of the ear tip amount with different amounts of eccentricity.

As can be seen from these figures, the amount of eccentricity changes linearly with the amount of movement of the eccentric cam. The amount of selvedge is different for different amounts of eccentricity, and therefore, good selvage can be achieved by winding under such adjustment.

(Effects of the invention) As described above, the device of the present invention has an eccentric cam for performing ear tipping that is tilted in the axial direction and is movable in the axial direction. It is not only eccentric, but also has an inclination, so it is possible to adjust the amount of change in traverse width, and it is also movable in the axial direction, so the amount of change in traverse width can be adjusted continuously and steplessly. Therefore, it is possible to set the optimum amount of selvedge according to the winding conditions for any type of yarn, and with the improvement of the winding device capacity, the loom It is extremely useful in obtaining threads with good unwinding properties that can be used at higher speeds, and has a remarkable effect as a selvedge mechanism.

[Brief explanation of the drawing]

1 and 2 are front views showing an example of the eccentric cam portion in the device of the present invention, and FIG. 2 shows the moved state. Fig. 3 is an enlarged view of the essential parts of the eccentric cam section, Fig. 4 is an explanatory diagram showing the amount of eccentricity, Fig. 5 is a chart showing the relationship between the amount of eccentric cam movement and the amount of eccentricity, and Fig. 6 is a diagram showing different amounts of eccentricity. FIG. 7 is a side view of a main part of an example of a conventional winding device. 1... Eccentric cam, 2... Sleeve, 3... Shaft, 4... Tatsuchi Roll, 5... Connection rod,
6...Cam box, 7...Thread guide, 8...Cradle arm, 9...Link mechanism, 10...Drum.

Claims (1)

[Scope of utility model registration request] In a yarn winding device that changes the traverse width of a yarn guide by using the amount of eccentricity of the eccentric cam as a variation amount via a touch roll, a link mechanism, and a connecting rod, the eccentric cam is formed into a cylindrical shape inclined with respect to the axial direction, A selvedge device for winding yarn, characterized in that it is disposed on a shaft so as to be movable in the axial direction.