JPH0529691B2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) Industrial Field of Application This invention relates to a driving device for a spinning frame drafting device, and particularly relates to a spinning frame drafting device that is highly effective when used in a multi-spindle spinning frame. This relates to a drive device.

BACKGROUND OF THE INVENTION In recent years, multi-spindle spinning machines with an increased number of spindles per spinning frame have been developed in order to increase productivity per unit floor area in spinning factories.
In this case, the pitch between each spindle is conventionally set to the minimum necessary size (for example, 75 mm), so if the number of spindles is increased, the spinning frame frame will become longer, and each roller of the spinning frame drafting device will also become longer. (For example, 240 weights on one side.
If increased to 480 spindles, each roller will be approximately 40m)
As a result, the twisting phenomenon of each roller becomes large, causing problems such as thread breakage and incorrect drafting. In particular, among the rollers of the drafting device, the second bottom roller (generally referred to as the bottom apron support roller), which requires high torque to rotate, is prone to twisting. The amount of torsion on the out-end side of the tom roller becomes large, and there is a major problem in that the out-end side causes yarn breakage or incorrect drafting due to rotational delay of the second bottom roller when starting or inching. Therefore, several drive devices for spinning machine drafting devices have been proposed in the past in order to solve the above-mentioned problems. One of the typical examples is as shown in FIG. 4, a front bottom roller 50 whose one end is rotationally driven by a drive motor has the same gears 51, 51 fixed to both ends thereof, and a back bottom roller. The same gears 71, 71 are fixed to both ends of the second bottom roller 60, and these gears 71, 71 and the gears 51, 51 are connected via gear trains 72, 72, respectively, and the same gears are fixed to both ends of the second bottom roller 60. The gears 61, 61 and the gears 71, 71 are connected to the gear train 6.
It was connected via 2,62. In addition, as disclosed in another Japanese Utility Model Publication No. 55-24152, a large-diameter drive shaft is provided in parallel with the second bottom roller, pulleys are fixed to both ends of this drive shaft, and the second bottom roller is Pulleys of the same diameter were fixed to both ends of the roller, and a timing belt was suspended between these pulleys. However, in the former case, both ends of the back bottom roller and the second bottom roller are rotationally driven via the front bottom roller.
A large torque is applied to the front bottom roller to rotate the ends of the back bottom roller and second bottom roller, and as a result, when the front bottom roller is long, the torsion of the front bottom roller increases, resulting in incorrect drafting. Because of this, it is necessary to make the front bottom roller large in diameter, and as a result, the gauge between the front bottom roller and the second bottom roller cannot be made small, resulting in a problem of deterioration of yarn quality. In the case of the latter, both ends of the second bottom roller and both ends of the drive shaft are connected by a timing belt, so the rotation speed of the drive shaft is the same as that of the second bottom roller, and the rotation speed is low. As a result, the torque applied to the drive shaft becomes extremely large, making it necessary to make the drive shaft extremely large in diameter, resulting in a problem of increased manufacturing costs. In addition, in the case of the latter, the drive shaft is placed on the top board (cross plate) of the spinning machine stand, so there is the problem that fluff easily adheres to the drive shaft, requiring a lot of manpower to clean it. It was hot.

Problems to be Solved by the Invention When the drafting device of a conventional spinning machine is lengthened, the twist of each roller, especially the second bottom roller, becomes large, causing problems such as thread breakage and incorrect drafting when starting or inching. In order to solve this problem, if both ends of the second bottom roller are rotationally driven via the front bottom roller, the diameter of the front bottom roller will become large, leading to a decrease in quality during drafting and increasing manufacturing costs. Another problem was that if the drive shaft were to rotate both ends of the second bottom roller via a timing belt, the drive shaft would have an extremely large diameter, resulting in extremely high manufacturing costs. .
Therefore, even if the countershaft is used to drive both ends of the second bottom roller to rotate synchronously, the present invention can reduce the thickness of the countershaft, and also allows the front bottom roller to rotate the second bottom roller. It is an object of the present invention to provide a driving device for a spinning and drafting device in which no torque is applied for this purpose.

(Structure of the Invention) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a countershaft rotatably disposed parallel to the second bottom roller of a spinning machine drafting device. Both ends of a second bottom roller are connected to both ends of the shaft so as to be rotated synchronously via a reduction mechanism, the countershaft is connected to a drive motor so that rotation can be transmitted, and the front bottom roller is connected to the drive motor. It is characterized by being connected to enable rotation transmission.

Function: The countershaft is rotated at high speed by the drive motor, and the high speed rotation of the countershaft is decelerated and transmitted to both ends of the second bottom roller via the deceleration mechanism, so that the torque applied to the countershaft becomes extremely small and Torque for rotationally driving the second bottom roller is not applied to the front bottom roller.

Embodiment In FIGS. 1 to 3, 1 and 1 are roller beams that constitute a part of the spinning machine stand, and there is a space between these roller beams 1 and 1 so that their upper surfaces are at approximately the same height position. A top board 2 is provided. On the roller beams 1 and 1, there are drafting devices 3 and 3, respectively.
are installed symmetrically on the left and right in FIG.
In this drafting device 3, reference numeral 4 denotes roller stands fixed on the roller beam 1, and as is well known, they are provided at every predetermined weight (generally 6 spindles). A front bottom roller 5, a second bottom roller 6, and a back bottom roller 7 are rotatably supported on these roller stands 4 via bearings (not shown), respectively. These three bottom rollers 5 to 7 are arranged parallel to the longitudinal direction of the spinning frame, and their length is set to be approximately twice the length of, for example, a normal spinning frame (generally 240 spindles on one side). and multiple tsuba spinning machines (for example, one side
480 spindles). A bottom apron 8 is stretched between the second bottom roller 6 and a front tension bar (not shown). On the front bottom roller 5, second bottom roller 6, and back bottom roller 7, there are a front top roller 9, a second top roller 10, and a back top roller, which are rotatably supported by top arms (not shown), respectively. The rollers 11 are placed on each weight or on a group of weights, and are pressurized with an appropriate load. A top apron 12 is stretched between the second top roller 10 and a front tension bar (not shown). The outer diameter of each of the bottom rollers 5 to 7 is set to approximately 25 mm to 30 mm, since it is generally not possible to widen the axis distance (gauge) of each roller to ensure good fiber drafting. 5. The outer diameters of the second bottom roller 6 and the back bottom roller 7 are set to 25 mm, 27 mm, and 25 mm, respectively, as an example. Further, the rotation speeds of the front bottom roller 5, second bottom roller 6, and back bottom roller 7 are, for example, 200 rpm, 10 rpm,
7 rpm, so that the front bottom roller 5 is rotated extremely fast and the second bottom roller 6 and back bottom roller 7 are rotated slowly. As shown in FIG. 3, the second bottom roller 6 is divided into two parts at approximately the center of its entire length, and is divided into two parts by two independent rollers 6a and 6b on the gear end side (the left side in FIG. 1) and the out end side. It is configured. Further, as shown in FIG. 3, the back bottom roller 7 is also divided into two at approximately the center of its entire length, and is constituted by two independent rollers 7a and 7b on the gear end side and the out end side.

Next, the gear end side end of the front bottom roller 5 is connected via a gear transmission mechanism 14 to a driving shaft 13 which is rotated in the direction of the arrow by a drive motor 13a. It is designed to rotate at high speed. In this gear transmission mechanism 14,
A front wheel 15 is fixed to the front bottom roller 5, and is meshed with a change wheel 17a fixed to the swing shaft 16. Another change wheel 17b is attached to the swing shaft 16.
is fixed to the wheel 18, and this change wheel 17b is fixed to the driving shaft 13.
The two intermediate wheels 18a are engaged with each other through two intermediate wheels 18a. The above two change wheels 17a, 17
b is for adjusting the total draft amount of the drafting section, and can be replaced in the same way as before. Next, a countershaft 19 is rotatably arranged in parallel with the second bottom roller 6 above the spinning frame table. As shown in FIG. 2, this countershaft 19 is disposed at the center of the R and L sides of the spinning frame and below the top board 2 over approximately the entire length of the frame, and is supported by bearings (not shown). ing. The gear end side end of the countershaft 19 is connected to the driving shaft 13 via a gear transmission mechanism 20. In this gear transmission mechanism 20, 21
is a counterwheel fixed to the countershaft 19, and is connected to the change wheel 17a of the gear transmission mechanism 14 via an intermediate wheel 22. The gear transmission mechanism 20 is configured such that the countershaft 19 is rotated considerably faster than the second bottom roller 6 and preferably faster than the front bottom roller 5. Both ends of the countershaft 19 are connected to the speed reduction mechanism 2.
3 and 23 to both ends of the second bottom roller 6, and the rotation of the countershaft 19 causes both ends of the second bottom roller 6 to rotate synchronously at low speed. In the drawing, these speed reduction mechanisms 23, 23 are similarly configured as a speed reduction gear train. In this speed reduction mechanism 23, 24 is a synchronous wheel fixed to the end of the countershaft 19, and the back bottom roller 7
The back bottom roller 7 is meshed with a first back wheel 25 fixed to the end of the back bottom roller 7 through a gear train 26, so that the end of the back bottom roller 7 can be rotated at a low speed. This gear train 26 is composed of a large number of gears 27-33 and intermediate shafts 34-36. A second back wheel 37 is fixed to the end of the back bottom roller 7, and is meshed with a change wheel 39 fixed to the swing shaft 38. Another change wheel 40 is fixed to the swing shaft 38, and this change wheel 40 is meshed with a second wheel 41 fixed to the end of the second bottom roller 6. The two change wheels 39 and 40 are used to adjust the amount of brake draft in the drafting section, and can be replaced in the same manner as before. In this embodiment, the countershaft 19 is also used to drive the drafting devices 3, 3 on the R and L sides. The outer diameter of this countershaft 19 is
, and the countershaft 19 can be used for both R and L.
Even when the length is made long for the above-mentioned multi-spindle spinning machine, it is set to be narrow within about 1.3 times the diameter of the front bottom roller 5 (for example, 30 mm).

In the case of the above configuration, the drive motor 13a
When the spinning machine starts operating by rotating the
The driving shaft 13 is rotated in the direction of the arrow by the rotational drive of the drive motor 13a, and the rotation of the driving shaft 13 causes the gear end side end of the front bottom roller 5 to move in the direction of the arrow via the gear transmission mechanism 14. The entire front bottom roller 5 is rotated at high speed in the direction of the arrow. In this case, a certain amount of rotational torque acts on the front bottom roller 5 in order to pressurize the front top roller 9 and pull out the fibers, but this rotational torque is relatively small and the front bottom roller 5 Since no other large rotational torque is applied, even if the length of the front bottom roller 5 is made long for a multi-spindle spinning machine and the outer diameter of the front bottom roller 5 is set to a small diameter of 25 mm, The twisting phenomenon of the front bottom roller 5 can be kept within a practical range that does not cause yarn breakage or illegal drafting. Further, due to the rotation of the driving shaft 13, the gear end side end portion of the countershaft 19 is rotated at high speed in the direction of the arrow via the gear transmission mechanism 20, thereby causing the entire countershaft 19 to rotate at high speed in the direction of the arrow. This countershaft 19
The high speed rotation of the second bottom roller 6
The roller 6a on the gear end side is rotated at low speed in the direction of the arrow with its gear end side end being decelerated via the gear end side reduction mechanism 23, and the roller 6b on the out end side of the second bottom roller 6 is rotated at a low speed in the direction of the arrow. The end portion is decelerated via the deceleration mechanism 23 on the out-end side and rotated at a low speed in the direction of the arrow. Further, the two rollers 7a and 7b of the back bottom roller 7 are also rotated at low speed via deceleration mechanisms 23 and 23 in the same manner as the second bottom roller 6. In the above case, the countershaft 19 has a second bottom roller 6b on the out-end side.
Rotational torque is applied to rotate the back bottom roller 7b, but this countershaft 19 rotates at a higher speed than the front bottom roller 5, greatly decelerating this rotation and driving the second bottom roller 6b at a low speed. Since the countershaft 19 is rotated, the rotational torque applied to the countershaft 19 becomes extremely small, and the twisting phenomenon of the countershaft 19 is reduced. Further, as described above, since the rotation of the countershaft 19 is greatly decelerated and transmitted to the second bottom roller 6b, the amount of twist of the countershaft 19 is also reduced by the amount of the deceleration and transmitted to the second bottom roller 6b.
Therefore, even if the length of the countershaft 19 is made long for a multi-spindle spinning machine and the outer diameter of the countershaft 19 is set to a small diameter, the twisting phenomenon of the countershaft 19 can be avoided to prevent thread breakage and illegal drafting. This can be kept within a practical range where it will not occur. Next, when the second bottom roller 6 is rotated as described above, a large rotational torque acts on the second bottom roller 6 due to the pressure applied by the second top roller 10 and the rotation of the bottom apron 8. Although a twisting phenomenon occurs, the second bottom roller 6 is rotated synchronously at the gear end side and the out end side, and in this embodiment, the second bottom roller 6 is divided approximately at the center of its entire length. Therefore, even if the length of the second bottom roller 6 is long for a multi-spindle spinning machine and its outer diameter is set to 27 mm, the twisting phenomenon of the individual second bottom rollers 6a and 6b, which are divided into two parts, will not occur. This is approximately the same level as the drafting device used in conventional spinning machines (240 spindles per side). As a result, the twisting phenomenon of the center bottom roller 6 as a whole can be kept within a practical range that does not cause yarn breakage or illegal drafting. In addition, the back bottom roller 7
Also, for the same reason as in the case of the second bottom roller 6, the twisting phenomenon of the back bottom roller 7 can be kept within a practical range that does not cause yarn slippage or incorrect drafting. As mentioned above, the twisting phenomenon of the front bottom roller 5, second bottom roller 6, and back bottom roller 7 can be kept within the permissible range, and these rollers 6 to 7 can be rotated smoothly. It can be effectively used as a drafting device for a spinning machine.

In the embodiment described above, since the countershaft 19 is disposed below the top board 2, it is possible to reduce the amount of fluff adhering to the countershaft 19 and to facilitate cleaning of the top board 2. Furthermore, since the countershaft 19 is also used as the drafting devices 3, 3 on the R and L sides, manufacturing costs can be significantly reduced. A pair may be provided for use.

(Effects of the Invention) As described above, in the present invention, a countershaft is rotatably arranged in parallel with the second bottom roller, and a speed reduction mechanism is connected to both ends of the second bottom roller at both ends of the countershaft. Since the front bottom roller is connected to the drive motor, the rotation speed of the countershaft can be made much faster than that of the second bottom roller, and the torsional torque applied to the countershaft during drafting operation can be minimized. During drafting work, the gear end and out end sides of the second bottom roller can be rotated periodically, reducing the amount of twist that occurs in the second bottom roller. Even when the tom roller is made longer and used in a multi-spindle spinning machine, it is possible to control the occurrence of yarn breakage and illegal drafting during startup or inching, and it is effective in maintaining high yarn quality. In addition, as mentioned above, we have made it possible to reduce the torsional torque applied to the countershaft, so even when the countershaft is long and used in a multi-spindle spinning machine, the thickness of the countershaft can be made relatively small, reducing manufacturing costs. This has the effect of lowering power costs. In addition, as mentioned above, both ends of the second bottom roller are rotated synchronously by the rotation of the countershaft, and the second bottom roller is rotated without going through the front bottom roller as in the conventional case. This has the advantage that even when the front bottom roller is lengthened and used in a multi-spindle spinning machine, the diameter of the front bottom roller can be made small and good drafting can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view, FIG. 2 is a cross-sectional view with some parts omitted, and FIG.
The figure is an explanatory diagram showing a drive system, and FIG. 4 is an explanatory diagram showing a conventional spinning machine drafting device. 3... Drafting device, 5... Front bottom roller, 6... Second bottom roller, 13a...
Drive motor, 19...Countershaft, 23
...Reduction mechanism.

Claims (1)

[Scope of Claims] 1. A countershaft is rotatably disposed parallel to a second bottom roller of a spinning machine drafting device,
Both ends of a second bottom roller are connected to both ends of the countershaft so as to be rotated synchronously via a reduction mechanism, the countershaft is connected to a drive motor so that rotation can be transmitted, and the front bottom roller is driven by the drive motor. A driving device for a drafting device of a spinning machine, characterized in that it is connected to a motor so as to be able to transmit rotation. 2. A driving device for a drafting device of a spinning machine as set forth in claim 1, wherein the countershaft is connected to a drive motor so as to be rotated faster than the front bottom roller. 3. A driving device for a drafting device of a spinning frame as set forth in claim 1 or 2, characterized in that the countershaft is disposed below a top board above the spinning frame stand. 4 Place the countershaft in the center of the R and L sides of the spinning machine stand, and connect this countershaft to the R and L sides.
Claims 1, 2, or 3 are characterized in that the invention is also used for driving a drafting device of a spinning machine on the side.
A driving device for a spinning machine drafting device as described in 2. 5. The second bottom roller is divided into two at an intermediate position in the longitudinal direction, and each of the divided second bottom rollers is rotationally driven from one side by a countershaft. A driving device for a spinning machine drafting device according to scope 1.