JPH052625Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a roving feeding device for a spinning machine that draws out roving from a roving winding and supplies it to a draft roller.

(Prior Art) Conventionally, in a spinning machine that supplies roving from a roving winding, a roving winding 3 is hung around a bobbin hanger 2 attached to a creel 1, as shown in FIG.
A roving 4 from the roving winding 3 is introduced into a draft roller 6 via a guide rod 5. (Jitsukai 59-44777
(See Figures 1 and 2) In this case, the supplied roving 4 passes through the guide rod 5 while changing its feeding position between the upper position of the winding layer and the lower position of the winding layer of the roving winding 3. It is supplied to the draft roller 6.

(Problems to be solved by the invention) In this invention, when feeding roving to a spinning machine, the position at which the roving 4 is pulled out changes greatly in the vertical direction of the roving winding 3, and the roving is pulled out in the middle. The angle at which the rod 4 touches the guide rod 5 increases or decreases, and not only does the pulling force vary;
A large resistance is applied to the roving yarn during the long distance from the roving winding 3 to the draft roller 6, which may cause breakage of the roving yarn in some cases.

(Means for Solving the Problems) In order to solve such problems, in the present invention, the upper part of the draft roller 6 and the creel 1
A guide roller 12 is provided in the vicinity of the side of the roving winding 3 suspended from the roving 3, and in order to actively drive the guide roller 12, the guide roller 12 and the draft roller 6 are connected by a transmission device and rotated. The guide roller 12 actively pulls out the roving 4 and guides it toward the draft roller 6 side. When connecting the guide roller 12 and the draft roller 6, the two shafts are connected by a chain or belt 14 so that the surface speed of the guide roller 12 is synchronized with the roving supply speed of the draft roller 6. This prevents excessive pulling force from being applied over long distances.

(Function) When the roving 4 is pulled out from the roving winding 3 suspended on the creel 1 of the spinning machine and introduced into the draft roller 6, the guide roller 12 for actively pulling out the roving 4
is driven by a transmission connection from the draft roller 6 and is rotated at the same speed as the surface speed of the draft roller 6, so that the roving 4 is pulled out of the roving winding 3 without strain.

In this case, there is no tensile force acting on the roving 4 over the long distance from the roving winding 3 to the draft roller 6 as in the conventional case, and the yarn is pulled out from a short distance near the lateral side of the roving winding 3, so yarn breakage does not occur. Now the roving 4 can be pulled out.

(Example) A specific example in which this proposal was implemented will be explained. 1st
In FIGS. 4 to 4, a support 8 is erected on the top of the spinning machine stand 7, and a support arm 9 and a support arm 9 extending in a direction perpendicular to the longitudinal direction of the frame 7 are provided on the top of the support 8. A creel 1 consisting of creel rails 10 arranged in parallel so as to extend in the longitudinal direction of the machine base 7 is provided in between.

The creel rails 10 are arranged two in parallel on both sides of the pillar 8, and the roving winding 3 is placed on the creel rail 10 via the bobbin hanger 2.
Each is drooped. The roving 4 pulled out from the roving winding 3 is passed through a guide roller 12 and a guide bar 13.
It is supplied to the draft roller 6 through the. This guide roller 12 is supported by a support block 11a at the tip of a support rod 11 vertically provided on the support arm 9, and is provided at a position near the lateral side of the roving winding 3. For example, when two guide rollers 12 are used as schematically shown in FIG. Provided along the longitudinal direction of the machine base,
A transmission device is provided at the end of the guide roller 12 to pull out the roving 4. This transmission device transmits power from a chain wheel or friction wheel 16 at the end of the draft roller 6 via a chain or belt 14 to a chain wheel or friction wheel 15 provided at the end of the shaft of the guide roller 12.
(a chain wheel is shown in the figure), and the other guide roller 12a has a pair of gears or friction wheels 15 at the ends of the shafts of the guide rollers 12, 12a.
It is designed to be actively driven via the terminals a and 15b.

The surface speed of the guide roller 12 is set to be the same as the surface speed of the back bottom roller 6b, which is supplied first among the draft rollers 6, and the rotation directions thereof are opposite to each other, so that the roving 4 is rotated from the top to the bottom.
The roving 4 is unreeled, and the roving 4 is actively drawn out from the roving winding 3.

Note that a tension roller 17 is provided in the middle to eliminate slack due to stretching of the chain or belt 14.

In the conventional guide rod 5, the contact angle to the guide rod 5 changes depending on the upper and lower positions of the roving winding 3 and the position at which it is fed out, but the guide rod 5 is fixed approximately in the middle of the displacement, and the roving When the feeding position of the roving 4 is at the upper position, the frictional resistance at the guide rod 5 is small, and the roving 4 is smoothly drawn out by the biting force of the lower back roller 6b. On the other hand, when the unwinding position of the roving 4 is at the lower part of the roving winding 3, it is once pulled upward to the guide rod 5 and the contact angle at the guide rod 5 becomes large. It receives the tensile force from the cross crawler 6, and since the distance between them is long,
In addition to the tension being applied to the roving 4, which varied widely, there were many chances for the roving to break.

In view of this, in the present embodiment, actively rotating guide rollers 12, 12a are provided in the vicinity of the lateral three rows of roving windings, and the rotation is controlled from the rotation of the back bottom roller 6b to the guide roller 1.
2, 12a, and the roving 4 on the roving winding 3 attached to the bobbin hanger 2 is transferred to the guide roller 1.
Since the structure is such that the roving yarn 4 is actively paid out toward the draft roller 6 side by the pulling force generated by the rotation of the roving yarns 2 and 12a, the roving yarn 4 is pulled out at a position close to the roving winding 3. Even if there is vertical displacement of the position of the guide rollers 12, 12a,
The difference in tension applied to the roving yarn 4, which is actively fed out, is small, and the occurrence of yarn breakage is extremely low.

In order to synchronize the surface speed of the guide roller 12 used in this embodiment with the surface speed of the back bottom roller 6b introduced into the roving 4, the diameter of the guide roller 12 is made the same as the diameter of the back bottom roller 6b. or change the diameter and number of teeth of the friction wheel or chain wheel 15. For example, when the diameter of the back bottom roller 6b is 25 mm and the diameter of the guide roller 12 is 22 mm, a chain wheel 15 with 22 teeth on the back bottom roller 6b side and 25 teeth on the guide roller 12 side, Synchronization is achieved by providing a transmission device such as attaching the chain 16 to the chain 14.

In another embodiment, as shown in FIGS. 5 to 8, the guide roller 12 is made into one roller, and the support block 11a at the tip of the support rod 11 is placed approximately in the middle of the three rows of roving windings suspended in the front and rear. A chain wheel 15 supported at the shaft end of this single guide roller 12 and a draft roller 6
A chain or belt 14 is hung around a chain wheel 16 provided at the end of the shaft, and the rotation of the draft roller 6 is transmitted to the guide roller 12. The diameter, tooth number ratio, etc. are adjusted so that the surface speed of the guide roller 12 and the surface speed of the draft roller 6b are synchronized.

In this second embodiment, since the roving is fed with the above-described structure, depending on the direction of rotation of the guide roller 12, for example, the roving 4 from the roving winding 3 on the rear row side is
As shown in FIG. 6, the roving 4 is passed around above the guide roller 12 as it is and sent out to the draft roller 6, but the roving 4 pulled out from the roving winding 3 on the front row side is passed around above the guide roller 12 as it is. If the roving 4 is rotated, the feeding direction and the rotating direction of the guide roller 12 will be opposite, increasing resistance and causing problems in implementation.
As shown in FIG. 7, the guide roller 12 is rotated from below in accordance with the rotating direction of the guide roller 12, and then fed out to the draft roller 6 side.

In such a case, since the roving winding 3 has a large diameter at the initial stage of unwinding from the roving winding 3, the front row side is pulled out from this large diameter state, goes around the guide roller 12 diagonally, and is unwound to the draft roller 6. The roving 4 unwound from the large-diameter roving winding 3 on the back row side is very close to each other, and the trumpet 18 usually traverses several mm just before being supplied to the draft roller 6. Therefore, there is a possibility that the rovings 4 overlap each other.

Therefore, as shown in FIG.
If a spiral groove 12b is provided in the guide roller 12
The roving 4 that has been passed around above does not overlap, moves along the spiral groove 12b, leaves the guide roller 12 above the introduction part of the trumpet 18, passes through the guide bar 13 and the trumpet 18, and is transferred to the draft roller 6.
supplied to

(Effects of the invention) As described above, according to the present invention, a guide roller that actively rotates near the lateral side of the roving winding is provided, so that
This reduces fluctuations in the pulling force of the roving as with conventional guide rods, which in turn reduces variations in the thickness of the roving, and at the same time replaces the conventional pulling force, which is a tension load over a long distance.
Because the guide roller is placed closer than before, the roving is actively pulled out with a small pulling force.
The chance of roving breakage is now reduced.

Furthermore, since the roving can be unreeled quickly with less resistance, the rotation of the spinning machine as a whole can be increased, which has the effect of further improving productivity.

[Brief explanation of the drawing]

1 to 4 show a first embodiment according to the present invention, and FIG. 1 shows a roving in which the roving is supplied to a draft roller from a roving winding suspended over a creel of a spinning machine according to the present invention. A side view showing the main parts of the supply device, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof.
FIG. 4 shows a perspective view of the main parts of the proposed device. 5 to 8 show a second embodiment according to the present invention, and FIG. 5 is a side view of the main part of the device;
Figure 6 is a side view showing how the roving is being let out from the rear roving winding, Figure 7 is a side view showing how the roving is being let out from the front roving winding, and Figure 8 is an example in which the guide roller is provided with a spiral groove. FIG. and the ninth
The figure is a side view showing a conventional roving feeding device using a guide rod. 1... creel, 9... support arm, 10... creel rail, 3... roving winding, 4... roving, 11...
...Support rod, 11a...Support block, 12,
12a... Guide roller, 14... Chain or belt, 15... Guide roller side chain wheel or friction wheel, 15a, 15b... Guide roller transmission gear, 16... Draft roller side chain wheel or friction wheel, 17... ...Tension roller.

Claims (1)

[Scope of utility model registration request] In a device in which the roving is suspended above the creel and the roving is supplied to the draft roller of the spinning machine, a pull-out guide roller is provided above the draft roller and in the vicinity of the side of the roving,
A roving supply device characterized in that the guide roller and the draft roller are connected by a transmission device.