JPH0545687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lifting device for a ring rail in a spinning machine such as a ring spinning machine or a ring twisting machine, and is used in the textile industry.

[Conventional technology]

In the short winding method of spinning machines such as ring spinning machines, the tip base is first formed on the bobbin to form a certain shape, and then the lifting device of the ring rail is sequentially attached while repeating one lifting winding. The lifting device uses a heart cam that moves together with a chin roller installed on the machine base to swing the lifting lever at a constant amplitude, and also sequentially rotates a shaper gear for each traverse to raise the ring. Wind the chain (belt) connected to the sail,
This chain gives a traverse motion to the ring rail and sequentially and steplessly lifts the ring rail up to the winding position, thereby winding it into a cot shape.

A method is also used in which one lifting is performed by using a clutch to switch between upward and downward movement of the ring rail.

[Problem that the invention seeks to solve]

When forming a tip on a bobbin by a short-stroke forming motion, if the ring rail is raised or lowered relative to the bobbin in a uniform motion, as shown for example in the arrangement pitch P ₂ of the thread Y in FIG. 2B, In one lifting length L, the thread pitch in the upper small diameter part becomes dense, the thread pitch in the lower large diameter part becomes coarse, and the small diameter part bulges out in a curved shape, which is undesirable.
As shown in the thread pitch _P1 in the figure, it is necessary to correct the thread pitches of both the small diameter part above the one-lifting and the large diameter part below to the same pitch _P1 .

Conventionally, as a means to make the yarn pitch in one lifting equal to the same pitch, the ascending movement from the large diameter part to the small diameter part in one lifting is sequentially and continuously changed as inconsistent movement, and The rising motion of the ring rail was corrected by vertically swinging the cam ball on the lifting lever with a heart cam designed to provide uniform motion.

However, in the heart cam swing, the structure is complicated and large, and when switching between ascending and descending in the traverse motion, it is difficult to make a quick turn, and the cam tends to stagnate due to lack of smoothness. On the other hand, there is a desire to increase the speed of ring spinning machines, and with this conventional method, the higher the speed, that is, the faster the ring rail moves up and down, the worse the ability of the cam ball to follow the heart cam becomes. Since this would make it difficult to wind the film stably at any time, we had no choice but to give up on increasing the speed.

In addition, the method of performing the traverse movement of the ring rail using a clutch does not have the problem of deterioration of followability as in the above method, so it is possible to increase the speed.
It was not possible to arrange the threads in the large diameter part and the small diameter part in one lifting at equal pitches or approximately equal pitches, and it was not possible to form a tip with a desirable shape.

[Means for solving problems]

As described above, with the conventional method, it is impossible to increase the speed of winding with equal pitch or approximately equal pitch, and there has been an urgent need to develop a new high-speed lifting device.

The present inventors have developed a new lifting device (one-lifting ring rail): (1) One-lifting using a reversible motor:
(2), One lifting using cylinder: (3),
One-lifting using a clutch: As a result of the study, we came to the conclusion that (3) one-lifting using a clutch is easier to put into practical use, but lifting using a clutch is different from the conventional device described above. A similar equal pitch correction is extremely difficult or impossible.

In the case of one-lifting, the ascending speed is slower than the descending speed due to the lifting power load, so the amount of line winding during ascending is greater than that during descending, and it is difficult to change the speed during ascending. For example, by focusing on the fact that the change in the amount of thread winding can be large with respect to a change in speed, and therefore the desired change in the amount of thread winding can be obtained with a smaller change in speed than when the change is made during descent, we have developed a clutch that moves linearly. The problems of the conventional device were solved by inserting a modified linear motion into a part of the lifting stroke. That is, the second
As shown in Figure A, in one-lifting, which has a traverse length L of rising from point a to point d and descending from point d to point e(a), a correction device is installed outside the clutch for raising the ring rail. Approximate results can be obtained by adding at least one series of clutches, using the same clutch to perform high-speed linear motion between AB and CD at the end of the ring rail's rise, and using another clutch to perform low-speed linear motion between BC. The yarn is wound at an equal pitch, that is, the yarn arrangement pitches of the large diameter portion and the small diameter portion on the bobbin are approximately equal.

[Effect]

As is clear from Fig. 2A, the clutch system that performs upward movement between AB at the beginning of the ring rail's rise and CD at the end of the ring rail's rise, and the clutch system that performs the upward movement at the middle part of the ring rail have different rising speeds. By switching between the two systems, it became possible to increase the speed between AB and CD, and it was possible to change the linear motion.
By switching and using a plurality of clutch systems with different speeds in combination during the upward movement in one lifting, it was possible to achieve ring rail movement that made the thread arrangement on the bobbin approximately equal pitch.

〔Example〕

FIG. 1 shows an embodiment in which one series of correction clutches is added to the lifting device of the present invention, and the motor M
A clutch 2 is mounted on a motor shaft 1 driven by a
3 and 4 are attached. Clutch 2 transmits upward rotation to the line shaft 18 through a high-speed ascending gear train 5, clutch 3 transmits upward rotation to the line shaft 18 through a low-speed ascending gear train 6, and clutch 4 transmits upward rotation to the line shaft 18 through a gear train 7. The rotation in the downward direction is transmitted to 18.

Mounted on the line shaft 18 are pinions 8, 8', each pinion engaging a rack 9, 9', respectively. The pinion 8' is engaged to raise and lower a rack 9' having a dot 10 for actuating limit switches 11, 12, 13 and 14 for clutch switching. The pinion 8 is engaged with a rack 9 that supports a ring rail 16 so as to move it up and down.

The slide bar 19 to which the limit switches 11, 12, 13, and 14 are attached is connected to the saver wheel 17.
The ring rail can be raised step by step, and the ring rail can also be raised step by step.

Control of the apparatus of this embodiment is performed as follows using the system shown in the block diagram of FIG.

Note that the normally open contact (-‖-) is called an a contact, and the normally closed contact (-‖/-) is called a b contact.

1 During machine operation, the coil of electromagnetic switch MS ₁ is ON.
become.

2 The a contact of MS ₁ closes and the lifting motor M rotates.

3 At the same time, the a contact of the other MS ₁ closes and power is supplied to the clutch control section.

4 When limit switch LS ₁₄ is turned on, relay CR ₁₄ is self-holding.

5 The a contact of CR ₁₄ closes and the lifting (high speed) clutch 2 turns on.

6 Even if limit switch LS ₁₄ is turned off,
Since CR ₁₄ is self-retaining, clutch 2 is
It remains ON.

7 When limit switch LS ₁₃ is turned ON, relay CR ₁₃ is self-holding. At the same time, CR ₁₃ b
CR ₁₄ becomes OFF because the contact opens.

8 CR ₁₄ turns OFF, clutch 2 turns OFF,
By turning on CR ₁₃ , the rising (low speed) clutch 3
turns on.

9 Even if LS ₁₃ is turned OFF, CR ₁₃ is self-retained, so clutch 3 remains ON.

10 When limit switch LS ₁₂ is turned on, relay CR ₁₂ is self-holding. At the same time, CR ₁₂ b
Since the contact is open, CR ₁₃ is turned OFF.

11 CR ₁₃ turns OFF, clutch 3 turns OFF,
When CR ₁₂ is turned on, the rising (high speed) clutch 2 is turned on again.

12 Even if LS ₁₂ is turned OFF, CR ₁₂ is self-retaining, so clutch 2 remains ON.

13 When limit switch LS ₁₁ is turned on, relay CR ₁₁ is self-holding. At the same time, CR ₁₁ b
In order for the contacts to open, CR ₁₂ is turned OFF.

14 CR ₁₂ turns OFF, clutch 2 turns OFF,
When CR ₁₁ is turned ON, the lowering clutch 4 is turned ON.

15 When descending, limit switches LS ₁₂ and LS ₁₃ are turned on in sequence, but the b contact of relay CR ₁₁ is
inserted in CR ₁₂ and CR ₁₃ respectively,
Because the b contact of relay CR ₁₁ is open,
Relays CR ₁₂ and CR ₁₃ are OFF. Therefore, during the descent, the ascending clutch 2 or
Clutch 3 will never turn on.

16 When limit switch 14 is turned on, CR ₁₄
is self-held and at the same time, the b contact of CR ₁₄ is opened, so CR ₁₁ turns OFF.

17 CR ₁₁ turns OFF, clutch 4 turns OFF,
When CR ₁₄ turns on, clutch 2 turns on,
The trend is to rise rather than fall.

The same operation is repeated below.

That is, the motor M always rotates at a constant speed in a fixed direction,
The line shaft 18 is rotated forward and backward by the motor shaft 1 through the one-lifting device to raise and lower the ring rail, and the total lifting device performs the single-split building.

The one-lifting device implements the approximate isopitch diagram of FIG. 2A as follows.

A → b section: Dock 1 attached to rack 9'
0 presses limit switch 14, clutch 2 is turned on (other clutches 3 and 4 are turned on)
OFF). Therefore, the line shaft 18 is driven from the lifting high-speed gear train 5, and the ring rail begins to rise.

b → c: If the dog 10 presses the limit switch 14 and then presses the limit switch 13,
Clutch 2 is turned OFF and clutch 3 is turned ON (clutch 4 remains OFF). The line shaft 18 is therefore driven from the lower gear train 6 for lifting than the gear train 5.

c → d: When the dog 10 presses the limit switch 12 after passing the limit switch 13, the clutch 3 is turned OFF and the clutch 2 is turned ON.
(clutch 4 remains OFF). The line shaft 18 is therefore again driven from the lifting high speed gear train 5.

d: When dock 10 presses limit switch 11, clutch 2 is turned OFF and clutch 4 is turned OFF.
is turned ON (clutch 3 remains OFF). The line shaft 18 is therefore driven from the gear train 7, the line shaft 18 reverses rotation and the ring rail begins to descend.

In the total lifting device, a slide bar 19 to which limit switches 11, 12, 13, and 14 are attached is raised one by one steplessly by means of a saper wheel 17, and a ring rail is raised one after another to perform a bottom building.

Although the above embodiment is a device in which one correction clutch 2 is added, it is clear to those skilled in the art that the more correction clutches are added, the closer the approximate isopitch diagram can be to the heart cam correction. It will be easy to understand from the description.

It is also possible to use a proximity switch instead of a limit switch for the clutch switching signal.

〔Effect of the invention〕

In addition to the ascending clutch and descending clutch of the line shaft, one or more ascending compensation clutches are added to introduce a compensating rate of change during the ascending movement with the longer elapsed time as shown in FIG. 2A. Since the correction change speed is introduced during the upward stroke where the amount of thread winding is larger than the downward stroke, the change in the amount of thread winding based on the change in speed can be effectively expressed, and the change in speed for correction can be reduced, making it possible to reduce the speed of the drive system. Pitch control of the thread arrangement can be achieved with high accuracy without causing any strain on the threads, and it has become possible to wind the threads with approximately equal pitch even though the one-lifting method uses a clutch.

While achieving a thread arrangement pitch similar to that of a conventional lifting device using a heart cam, it is possible to easily make a quick turn in raising and lowering a ring rail, and to perform lifting by smooth movement, thereby achieving the provision of a lifting device that can respond to higher speeds.

The device of the present invention has a simpler structure and can be made more compact than conventional heart cam means.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the device of the present invention. FIG. 2A is a one-lifting diagram performed by the apparatus of the present invention. FIG. 2B is an illustration of an approximately equal pitch yarn layer wound on a bobbin. FIG. 3 is a block diagram for explaining the operation of the machine. 1: Motor shaft, 2, 3, 4: Clutch, 5,
6, 7: Gear train, 8, 8': Pinion, 9, 9':
Rack, 10: Dock, 11, 12, 13, 1
4: Limit switch, 15: Cylinder, 16:
Ring rail, 17: Saper wheel, 18: Line shaft, 19: Slide bar, L: One lifting, M: Motor, MS ₁ : Electromagnetic switch,
CR ₁₃ to CR ₁₆ : Auxiliary relay, LS ₁₃ to _{LS 16} : Limit switch, TF: Transformer, RF: Rectifier.

Claims (1)

[Claims] 1. Ring rail 16 in one-lifting
The raising and lowering of the line shaft 18 is performed by switching the high-speed raising gear train 5, the lower-speed raising gear train 6, and the lowering gear train 7 using the switching clutches 2, 3, and 4 attached to the motor shaft 1. To provide a lifting device for a spinning machine which transmits rising rotation and descending rotation and adds at least one correction change speed when a ring rail rises, thereby making it possible to wind up a yarn with an approximately equal pitch yarn arrangement. 2. The lifting device according to claim 1, wherein the limit switch groups 11, 12, 13, and 14 for actuating the clutch groups 2, 3, and 4 are controlled by the dog 10, which moves up and down as the line shaft 18 rotates in the normal and reverse directions.