JPS606053Y2 - Remaining yarn sensing device for bobbins transferred in an upright position - Google Patents

Description

[Detailed description of the invention] The present invention is designed to reduce the amount of yarn remaining on the bobbin when it is transported in an upright position after being used for wine goo, textiles, etc. The present invention relates to an improvement in a bobbin residual yarn sensing device used to detect the presence of yarn and automatically sort the bobbin, and is a relatively simple mechanical mechanism, easy to adjust, and easy to operate. The aim is to provide highly reliable equipment.

Conventional devices of this type include those that bring a feeler into direct contact with the bobbin and detect the presence or absence of remaining thread by detecting its displacement, or detect the presence or absence of remaining thread by shining a light beam onto the bobbin surface and capturing the reflected color. However, in the former, the bobbin is made of wood, paper, or synthetic resin, and there are variations in dimensional accuracy, so there is a large error in sensing, and in the latter, the sensitivity varies depending on the color tone of the bobbin itself. It has drawbacks such as low operational reliability.

The present invention provides a remaining thread sensing device free from the above-mentioned drawbacks by having the configuration described in the claims of the utility model registration.

The configuration of the illustrated embodiment will be explained below.

The drawing shows an example installed in an automatic yarn repeating machine called an automatic yarn repeater, and as shown in FIG. A residual yarn sensing device 4 according to the present invention is fixed at the position, preferably just before the device for sorting the bobbin 3 based on the presence or absence of residual yarn.

The remaining thread sensing device 4 is composed of a bobbin sensor 5 and a remaining thread sensor 6, and the remaining thread sensor 5 is connected to the machine frame at the rear end 5' in the bobbin transfer direction shown by arrow A. It is pivotally connected by a shaft 8 to a bracket 7 fixed to the side.

The bobbin sensor 5 moves the side edge 9 of the bobbin 3 into the circular orbit 2.
The elasticity of the coil spring 11 interposed between the bracket 7 and the bobbin 3 allows the side edge 9 to contact the lower peripheral surface 10 of the bobbin 3 to which the bobbin 3 is being transferred. It is energized so that it can hold.

Reference numeral 12 in the figure is a stopper for regulating the above position.

Further, the reference numeral 13 indicates an oblique side portion of the first side edge 9, which is a bobbin introducing portion.

The remaining yarn sensor 6 is pivotally mounted on the bobbin sensor 5.

That is, at one end 14 of the remaining yarn sensor 6 on the rear side in the bobbin transfer direction, it is pivotally connected to the bobbin sensor 5 by the shaft 15.
The first sensing side edge 16 has a predetermined slight clearance C from the position of the first side edge 9 of the bobbin sensing body 5,
A coil spring 18 is disposed outwardly with respect to the bobbin 3 and is in contact with the residual yarn layer 17 on the bobbin 3, and is interposed between the coil spring 18 and the bobbin sensor 5. The bobbin sensing element 5 is regulated by a stopper 19, which is biased by a spring so as to maintain the position at all times.

Within the rotation range in which the other end 20 of the remaining yarn sensing body 6 is rotated about the shaft 15 in the direction of arrow B against the elasticity of the coil spring 18, the end 20 A sensing switch 21 is disposed which is operated by.

The sensing switch 21 outputs a residual yarn sensing signal, and may be any arbitrary switch such as a microswitch.

The device of the present invention has the above-mentioned configuration and operates as follows.

Now, assuming that the entire apparatus is in the arrangement shown in the parallel view in FIG. In the case of a bobbin, the lower circumferential surface 10 of the bobbin 3 first hits the oblique side 13 of the first side edge 9 of the bobbin sensing body 5, and the bobbin sensing body 5 is slightly rotated in the direction indicated by the arrow. However, since it is an empty bobbin, it does not have any effect on the remaining thread sensing device 6.
passing through the installation site.

Next, residual yarn is generated due to yarn breakage, and when the bobbin having the residual yarn layer 17 is transferred, the lower circumferential surface 10 of the bobbin 3 is moved to one side edge of the bobbin sensor 5, as described above. 9
The bobbin sensor 5 is brought into contact with the side edge 9 from the oblique side 13 of the bobbin sensor 5, and the bobbin sensor 5 is slightly rotated in the direction of the arrow.

The amount of rotation differs from bobbin to bobbin depending on the amount of bobbin dimensional error, but the amount of rotation varies between the one side edge 9 of the bobbin sensor 5 itself, the remaining thread sensor 6 pivotally mounted on the bobbin sensor 5, and the bobbin 3.
Since the relative positional relationship between the bobbin and the lower circumferential surface 10 does not change at all, the rotation of the bobbin sensor 5 serves to absorb and eliminate dimensional errors between the bobbins.

Next, the bobbin 3 reaches the remaining thread sensing body 6, and the remaining thread layer 17 comes into contact with the sensing side edge 16.

As described above, the sensing side edge 16 is located with a clearance C outward from the one side edge 9 of the bobbin sensing body 5, so the amount of this clearance C is determined by the residual amount that needs to be sensed and detected. By making the thickness of the yarn layer correspond to the yarn amount, in the case of a bobbin having a residual yarn layer 17 exceeding the residual yarn amount, the residual yarn layer 17 comes into contact with the sensing side edge 16, By pressing this and making the elasticity of the coil spring 18 weaker than that of the coil spring 11, the remaining yarn sensing body 6 rotates about the shaft 15 in the direction of arrow B according to the amount of remaining yarn. This causes the other end 20 of the sensing body 6 to undergo an enlarged rotational movement.

The rotation activates the sensing switch 21,
It outputs a residual yarn detection signal.

Based on this sensing signal, subsequent treatment of the remaining thread bobbin can be carried out by known means.

In the above-mentioned operation, the difference in the bobbin diameter between the bobbins is absorbed, corrected and eliminated by the rotation of the first bobbin sensor 5 in the direction of the arrow. Only the presence or absence of 17 is reliably sensed.

When the bobbin 3 finishes passing in front of the remaining yarn sensing device 4, the device returns to its old position and is ready for the next time the bobbin passes.

As described above, in the device of the present invention, the elasticity of the coil spring 18 is set to be weaker than the elasticity of the coil spring 11, so that the difference in the outer diameter of each bobbin is absorbed, corrected, and eliminated, and the remaining amount is more than the required amount. It has the advantage of being able to accurately sense the presence of the yarn layer and output a sensing signal, making the mechanism relatively simple mechanically, and facilitating adjustment.

It can be effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment, FIG. 2 is an enlarged plan view of only the main parts, and FIG. 3 is a side view showing the relative positional relationship with the bobbin. 3...Bobbin, 4...Remaining yarn sensing device,
5... Bobbin sensor, 5'... End of bobbin sensor, 6... Remaining yarn sensor, 9...
...One side edge of the bobbin sensor, 10... Lower peripheral surface of the bobbin, 14... One end of the remaining yarn sensor, 16
... Sensing side edge, 17 ... Residual thread layer, 21
......Sensing switch, C...Clearance.

Claims (1)

[Scope of utility model registration request] A bobbin sensor, which is positioned parallel to the transfer locus of the bobbin transferred with its side edge in an upright state and in contact with the lower circumferential surface of the bobbin, is positioned at the rear end of the bobbin in the transfer direction. A remaining thread sensor is pivotally mounted on the bobbin sensor at one end on the rear side in the direction of movement of the bobbin. The I-side sensing side edge of the remaining yarn sensing body is located at a position that has a predetermined slight clearance outward from the bobbin from the position of the first side edge of the bobbin sensing body, and is located above the bobbin being transferred in the upright state. It is placed in a position where it can come into contact with the remaining yarn layer, and is given spring elasticity so as to always maintain several positions, and this spring elasticity is made weaker than the spring elasticity given to the bobbin sensor. A remaining thread sensing device for a bobbin transferred in an upright state, characterized in that a sensing switch operated by the other end of the thread sensing member is disposed within a rotation range of the other end of the thread sensing member.