JPS58104223A - Roller-driving system in spinning frame - Google Patents

Abstract

PURPOSE:The titled system in which the propagation of irregular rotation and vibration occurring in middle rollers and back rollers is reduced to prevent the uneven rotation of front rollers, thus reducing uneven drafting. CONSTITUTION:After the rotation of the driving motor M is transmitted to the input shaft 12, the rotation is branched into the first transmission path to the shaft 13 for driving the front rollers and the second one to the shafts 14 and 15 for driving the back rollers and the middle rollers respectively. In the first transmission path between the input shaft 12 and the front-roller drving shaft 13, another transmission path is set for driving both the shaft 22 for driving the winding-up roller with high moment of inertia and the shaft 23 for diriving the drawing-up rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller drive device in a spinning machine, and more particularly to a roller drive device that prevents draft unevenness in a draft device.

In a spinning machine, it is inevitable that the thickness of the spun yarn varies, that is, yarn unevenness occurs. The yarn unevenness mentioned above has been measured as periodic unevenness and non-periodic unevenness. Non-periodic unevenness is caused by abrasion of the apron surface in the draft part, impurities mixed in the sliver, or gearbox break draft. This is due to variations in the meshing of related gears and the load on the middle roller, and this break draft, that is, variations in the back roller and middle roller, is transmitted to the 70 controller, causing non-periodic unevenness. In other words, in a three-wire type hair draft device, the break draft ratio between the back roller and the middle roller is smaller than the main draft ratio between the middle roller and the front roller, so slight variations in the break draft directly affect the yarn. Although the effect on unevenness is small, if at all, some rotational unevenness of the front roller, which rotates at high speed, immediately becomes a major cause of yarn unevenness. Further, periodic yarn unevenness is often caused by wear on the surface of each roller itself or precision of the drive gear, and periodic rotation fluctuations of the back roller and middle roller may affect the front roller. In any case, yarn unevenness with large fluctuations in yarn thickness not only interferes with the subsequent weaving and knitting processes, but also causes fabric defects and lowers the product value.

The present invention aims to eliminate the above-mentioned drawbacks.
In other words, uneven rotation occurring in the middle roller and back roller,
It is an object of the present invention to provide a drive transmission device for a draft device that prevents vibrations from propagating to other rollers, particularly 70 rollers, and spins high-quality yarn.Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows the manufacturing process of spun yarn, in which a sliver (S) is pulled out from a can (not shown) and is actively rotated by a back roller (
,1), middle roller (2) with apron (3) attached
, and 70 ton ty-ra (4) and are drafted directly without passing through a roving process, and furthermore, for example, two air injection nozzles (5) (6) in which the air streams swirl in opposite directions to each other. Give the thread a swirl with one nozzle of
Twisted yarn (Y) is produced using an air spinning device that generates a balloon by using the other nozzle to generate yarn, or an air spinning device that applies suction using one nozzle and gives the yarn a swirl using the other nozzle. The material is spun out and wound onto a package (9) which is actively pulled out by a take-up roller (7) and rotated by a take-up roller (8).

The three sets of rollers (1), (2), and (4) have different circumferential speeds, and are gradually drafted depending on the difference in circumferential speed. At this time, the peripheral speed of each roller (1) (2) (4) is vL
V2. When V4 is assumed, there is a relationship l<V2<V4 between the circumferential speeds, and the circumferential speed ratio between each roller is set according to the draft ratio. Setting of the circumferential speed ratio is performed by converting gears of the roller drive section, which will be described later. Generally, the break draft between the back exit (1) and the middle roller (2) is smaller than the main draft between the middle roller (2) and the 70 controller (4), and is calculated by multiplying the break draft ratio by the main draft ratio. is considered the total draft. Furthermore, when the sliver (S) passes between the rollers rotating under pressure, the sliver tends to expand into a flat shape due to the pressure of the rollers. Laura (2)
The rollers (1), (2), and (4) are each composed of a pair of rollers, but the bottom roller (Ia
) (2a) Only (4a) rotates actively, and the top roller (
1b), (2b), and (4b) are pressed against the bottom rollers (1a), (2a, and 4a) by a pressing means (not shown) and rotated as a result. FIG. 2 shows the first embodiment of the driving section of the spinning machine described above. As an example, the rotation of the drive motor (M) begins with an endless bell) (
11) to the input shaft (12). From the input shaft (12), a front roller drive shaft (13), a middle roller drive shaft (14), and a back roller drive shaft (15) are connected.
The transmission route to the branch branches. That is, the first transmission path (Ll) to the front roller drive shaft (13) is the input shaft (12).
The intermediate take-up roller gear (
17), pull-out roller gears (18) (19), and feed ratio conversion gears (20) (21) arranged in series between the input shaft (12) and the 70 controller drive shaft (15). The take-up roller (8) and the pull-out roller (
7) via the drive shafts (22) and (23).

On the other hand, the input shaft (12) is connected to the middle roller drive shaft (1
4) and another transmission path (L2) (L3) (L4) for transmitting power to the back roller drive shaft (15). In other words, the transmission path (L2) is a reduction gear (24) (25) (2<5) that decelerates the rotation of the input shaft (12).
(27) and gears (28) (29), and the path (113) is a gear train (30) (31) (32) (33) (34) that transmits to the middle roller drive shaft (14).
), and the path (IJ4) is composed of gear trains (35) (615) to (43) (44) that branch from the gear (29) and transmit power to the back roller drive shaft (15). In the above gear train, gears (31) and (32) are gears for adjusting the rotation speed of the middle roller (2) and changing the main draft ratio, and gears (36) and (37).
(40) and (41) are gears for changing the total draft ratio between the back roller (1) and the front roller (4), and the high-speed rotation of the input shaft (12) is gradually decelerated by a large number of gear trains. This reduces uneven rotation, impact, etc. by alleviating the rapid deceleration of the middle and back rollers, which rotate at a slower speed than the front rollers.

By configuring the power transmission path described above, the pack roller (1), middle roller (2) and front roller (
4) The motor (M) with large inertia force and the winding roller (
8), a pull-out roller (7) is interposed, a back roller,
Even if rotational fluctuations occur in the middle ruler, the moment of inertia is large, so even if a change in moment occurs, an instantaneous speed regulating action works to suppress the speed fluctuation, so that the fluctuation becomes gentler. The influence of uneven rotation is alleviated.

Further, FIG. 3 shows a second embodiment of the drive section.

That is, the rotation of the drive motor (M) is once transmitted to the input shaft (12) via the bell (11);
2) to the front roller drive shaft (13)
Ll), middle roller drive shaft (14) and back,
Branched into transmission path (L5) to roller drive shaft (15) - Front roller drive shaft (13) A path (Ll)
is the same as the first embodiment, and the input shaft (12) is rotated through the gear (17) for the take-up roller drive shaft (22), the gear (18) for the pull-out roller drive shaft (23), and further The front roller drive shaft (13) rotates at high speed via the variable speed gears (21) (46).

On the other hand, the power transmission path (L5) for the middle roller and back roller branched from the input shaft (12) is connected to the input shaft (12).
A worm (46) fixed to the worm (46), a worm gear (47) meshing with the worm (46), and a worm gear (46)
7) has a screw gear (49) fixed on the shaft (48) and a screw gear (50) meshing with the screw gear (49),
A gear train (30) for transmitting power from the above screw gear (5 gears and a gear (29) integrated with a screw) to the middle roller drive shaft (14)
(31) (32) (53) (34) A path (L6) consisting of a gear train (35), (36) to (43) (44) for power transmission to the back roller drive shaft (15) The route (Ll) is branched.

In addition, in the above gear group, two or three gears shown as concentric circles in the drawing are fixed coaxially and rotate integrally.For example, the large and small gears (30) and (31) in Fig. 3 are coaxially fixed. This means that the key is fixed and the large gear (30) meshes with the lower gear (29) and the small gear (31) meshes with the upper gear (32), and other gears and the first embodiment The same is true for the gears in .

Therefore, in the case of the second embodiment, in addition to the motor (M) with a large moment of inertia, the take-up reseller drive shaft (22), and the pull-out roller drive shaft (23), the worm (46),
Worm gear (47) to 70 controller drive shaft (13)
By interposing the worm and the worm gear between the middle roller drive shaft (14) and the back roller drive shaft (15), the worm and the worm gear can be automatically tightened and the worm gear (47) can be rotated from the worm (46). However, due to the unique property that the worm (45) cannot be rotated from the worm gear (47), uneven rotation or fluctuations on the back roller and middle roller sides are prevented by the worm gear (47), and It does not affect the transmission [8 (Ll). Therefore, large fluctuations in the rotation of the front roller are absorbed and alleviated along the transmission path without being transmitted.

Next, experimental results of yarn unevenness measurement of yarn spun by a spinning machine driven by the above drive device will be shown.

The yarn unevenness measurement device used was a yarn unevenness information analysis device disclosed in Japanese Patent Application No. 5fS-161869 filed earlier by the present applicant. That is, the electric signal from the slab catcher is used as a signal for yarn unevenness analysis, and the signal converted into a digital signal is subjected to spectrum analysis by an FFT analyzer and displayed on a display to measure yarn unevenness.

In this experiment, yarn unevenness caused by the drive device was measured in the second embodiment of the above first and second embodiments, that is, when a worm and a worm gear were used, but there was a large difference in the results when the device of the first embodiment was used. It has also been confirmed that there are no.

Figure 4 shows a yarn speed of 130+n/min and a yarn count of Ne40. ) - This shows the yarn unevenness under the conditions of 257 barrel draft and 35 main draft.
6, Total Dragon 7) 296, Main Draft 35
In the case of Fig. 6, the conventional device is used, and the yarn speed is 130 m.
/ minute, number N145, ) - Taldra 7 ) 307
The case of s main driver 7) 41 is shown. In addition, 4th to 6th
In the spectrum graph shown in the figure, the horizontal axis shows the frequency in Hertz (H=), and the vertical axis shows the voltage (-), which shows the degree of yarn unevenness.
V) is taken.

Furthermore, the period of the front top roller is known in advance from the yarn speed, the diameter of the front top ruler, and the diameter of the front bottom roller. In the case of this experiment, the period of the front top roller is 25 rps, and the period of the bottom roller is 28.8 rps. It turns out that the yarn unevenness is caused by the roller, and the height of the peak is expressed as the size of the yarn unevenness, that is, the amount of variation in yarn thickness. For example, in the case of Figure 4, 7
o)) Thread unevenness caused by tubular is 48.1m
The yarn unevenness caused by the front bottom roller corresponds to 24.7 mV, and the degree of yarn unevenness can be read. Furthermore, it can be seen that the degree of yarn unevenness is smaller in the case of FIG. 5 than in the case of FIG. Figure 6 shows the case of a conventional drive device in which, for example, the motor rotation speed is transmitted in series from the 70 roller drive shaft to the middle roller drive shaft and the bank row drive shaft, in this case the front The degree of yarn unevenness caused by the top roller and front bottom roller is much larger than that in the above example, and the amount of variation in yarn thickness is large, and peaks (Pl) (P2) (p3) etc. also occur at other frequency positions. It can be seen that the rotational unevenness of the pack roller and middle roller spreads to the front roller, and draft unevenness occurs at a period other than the specific period of the 70 controller.

In addition, when the total draft ratio is changed, when the main draft ratio is changed, when a load is applied to all spindles of the spinning machine by the cradle, when a load is applied only to a specific spindle, etc. A diagram was obtained, and it was confirmed that the rotational unevenness of the Tsukutsuru roller and the middle roller was absorbed and alleviated in the power transmission path without spreading to the 70 controller.

As described above, in the present invention, when transmitting the rotation of the drive motor to the back roller, the middle roller, and the 70 controller, the rotation is first transmitted to the input shaft of the gearbox, and then the rotation is transmitted to the first transmission path to the front roller and the back roller. The second transmission path to the middle roller is branched to another path, and the take-up roller and pull-out roller drive shafts, which have a large moment of inertia, are driven in the first transmission path between the input shaft and the flint roller drive shaft. Because of the built-in transmission path, uneven rotation of the back roller and middle roller, and fluctuations that spread to the front roller, are smoothed out by the middle roller with a large moment of inertia, and speed fluctuations are suppressed, so to speak. The drive shaft has the role of a damper and can suppress the speed fluctuations of the 70 controller rotating at high speed, reducing the number of drum irregularities and reducing the fluctuations in the thickness of the spun yarn, making it possible to produce high-quality yarn. can.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a spinning machine, FIG. 2 is a schematic configuration diagram showing a first embodiment of the present invention, FIG. 3 is a schematic configuration diagram showing a second embodiment of the invention, and FIG. FIG. 5 is a spectrum graph showing the state of yarn unevenness of yarn spun by the apparatus of the present invention, FIG. 5 is a spectrum graph obtained by changing the same conditions, and FIG. 6 is a spectrum graph by a conventional apparatus. (12)...Input shaft (13)...Front roller sliding shaft (14)...Middle roller drive shaft (15)...Pack roller drive shaft (22)...Take-up drive Shaft (23)...Pull-out roller drive shaft

Claims (1)

[Claims] an input shaft connected to the drive motor; a first transmission path for transmitting power from the input shaft to the front roller drive shaft; and a second transmission path for transmitting power from the input shaft to the pack ruler drive shaft and the middle roller drive shaft. and the first route,
The second transmission path is separated from the input shaft, and the first transmission path is separated from the input shaft.
A roller drive device for a spinning machine, characterized in that a transmission path for transmitting power to a drive shaft of a take-up roller and a pull-out roller is included in the transmission path.