JPS59192732A - Driving mechanism of draft roller in spinning machinery - Google Patents

Abstract

PURPOSE:In rotating and driving two or more roller shafts among plural roller shafts by gears at their both sides, to prevent disorder caused by impropriety of number of revolutions, by setting a detector for number of teeth of gear, making starting impossible when numbers of teeth at both the sides are not coincident. CONSTITUTION:For example, in a draft device having the back roller 1, the middle roller 2, and the front roller 3, when two or more (three in the figure) among the rollers 1-3 are driven by gear groups set at their both ends in order to prevent torsion of roller shafts having a large number of spindles attached to them, a detector for numbers of teeth of gears is set to prevent occurrence of trouble when gear groups are different at the left and right sides. When numbers of teeth of gears are not coincident at the left and right sides, starting is made impossible. The differential transmission 18 is preferable as the detector for numbers of teeth of gears when the exchanging gear 6 to be engaged with the two fixed gears 9 and 11 is exchanged for the exchanging gear 6A attached to the lever bracket 14, and a rotary encoder, etc. may be used.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a trough roller drive mechanism in a spinning machine in which both ends of a plurality of bottom rollers are operatively connected by gear mechanisms.

Prior Art In recent years, there has been a noticeable trend toward increasing the number of spindles in spinning machines such as roving frames and fine spinning frames, but the multiple bottom rollers that make up the trough roller mechanism inevitably become longer and more susceptible to overload. As a result, yarn breakage and yarn unevenness are unavoidable due to an increase in the amount of twist of each bottom roller, and furthermore, the risk of breakage of the bottom roller increases.

As a countermeasure against this, a measure is generally taken in which both ends of each bottom roller are operatively connected by gear mechanisms having the same rotational speed ratio to reduce the overload. An example of this is shown in FIG. 1, where a symmetrical gear mechanism G1. G
The rotational speed ratio among the bank bottom roller 1, middle bottom roller 2, and front bottom roller 3, which are driven by the morph M via the spindle 2, needs to be appropriately changed in accordance with changes in the spinning conditions. Therefore, both gear mechanisms Gl and G2 include a change gear 4 for changing the rotational speed ratio between the bank bottom roller 1 and the middle bottom roller 2, which provide a preparation draft.
, 5. A change gear 6.7 is provided for changing the rotational speed ratio of the bank bottom roller 1 that forces the main draft and the front bottom roller 3.

Now, depending on the change in spinning conditions, for example, change gear 6
．． 7, if one of the change gears is replaced incorrectly and the machine is operated in this state, one of the bottom rollers 1, 2, 3 will break. If threaded joints are used for bottom rollers 1, 2, and 3,
Looseness occurs in this joint.

Of course, if the change gears 4 and 5 are replaced incorrectly, the same accident as described above will occur.

A case law regarding the gear mechanism is shown in FIG. 2, but even in this example, if the change gears 4, 5 or the change gear 6.7 are replaced incorrectly (d), it will lead to breakage of the bottom roller 2 or 3.

In order to prevent the bottom roller from breaking, an overload protection device consisting of a clutch mechanism etc. is installed in the operating connection part of the gear mechanism etc.
In the event of a mistake in changing the change gear, it is possible to activate the protection device to release the operational connection and avoid breakage of the bottom roller, but in this breakage prevention device, when the overload protection device is activated, The rotational speed ratio between each bottom roller changes, and thread breakage occurs at most of the weights.

In the trough roller mechanism shown in Fig. 3, the middle bottom roller 2, which has the largest rotation resistance, is divided into two parts at the center, and
This prevents the twisting phenomenon in the second part. However, in a draft roller mechanism in which the bottom roller is divided into two in this way, if the change gear 4°5 is replaced incorrectly, the spinning conditions on the divided bobbin roller 2A side and 2B side will be different. Sweet. Also in this example, if the change gear 6.7 is replaced incorrectly, the bottom roller 1 or 3 will break.

Purpose The present invention has been made in order to eliminate the above-mentioned defects, and the present invention has been made in order to solve the above-mentioned defects.When the change gear is replaced in response to a change in the intended spinning conditions, the draft in the spinning machine can be detected before the machine is started due to replacement errors. The entire roller drive mechanism is to be provided.

Configuration In order to achieve the above object, the present invention detects the number of teeth of a corresponding pair of change gears in a gear mechanism provided at both ends of a plurality of bottom rollers in response to a change in the setting of the rotation speed ratio between a plurality of bottom rollers. A configuration is adopted in which a number of teeth detection device is provided to detect a difference in the number of output teeth of both change gears, and a control device is provided which issues a signal to prevent the machine from starting, or to display the detection result. ing.

First Embodiment An embodiment embodying the present invention will be described below with reference to FIGS. 1 and 4.

Here, we will discuss the case of replacing the change gear 6.7 to change the rotational speed ratio between the bank bottom roller 1 and the front point roller 3, which provide the main draft. Both the change gear 6 that meshes with the constant gear 9 supported by the shaft 8 and the constant gear 12 that meshes with the constant gear 11 supported by the shaft 10 are supported! 1
iii113 is rotatably attached to a lever bracket 14 rotatably supported on the shaft 10. That is, the shaft 13 of the change gear 6 is rotatable about the shaft 10, and is rotated according to the rotational position of the lever bracket 14, which is fixed by a bolt 16 and a nand 17 inserted through an arcuate guide hole 15. It can be adjusted to an appropriate position.

A differential transformer 18 is provided near the lever bracket 14, and the output voltage from the differential transformer 18 changes depending on the rotational position of the bracket 14. That is, when the rod 21, which is slidably provided in the storage tube 19 and is brought into contact with the lever bracket 14 by the compression spring 20, is moved as the bracket 14 rotates, the core provided in the rod 21 is moved. Part 21. -a
is displaced relative to the coil 22 in the storage tube 19, and the output voltage changes according to the principle of a differential transformer.

On the other hand, on the change gear 7 side, a mechanism consisting of a lever bracket 14 and a differential transformer similar to that described above is symmetrically provided.

The output voltages from both differential lances are sent to a control device (hereinafter referred to as C1), not shown, and the device C1 compares these two output voltages, and when there is a difference between the two output voltages, the machine It is designed to keep the engine from starting, and also to emit a signal to light up a warning lamp (not shown).

Now, when the change gear 6 is replaced with the change gear 6A shown by the chain line in FIG. 4 in response to a change in the spinning conditions, the lever bracket 14 is pivoted to the position shown by the chain line in the same figure. In response to this, the rod 21 is also suppressed and shifted to the position shown by the chain line, and the output voltage (hereinafter referred to as Vl) corresponding to the rotational position of the lever bracket 14 is applied to the differential transformer 18.
from there to the timing control device. Similarly, when the change gear 7 is replaced in response to a change in the spinning conditions, the output voltage (hereinafter referred to as V2) corresponding to the rotational position of the lever bracket of the same gear 7 (l)ll will be changed. The signal is sent from the differential transformer on the gear 7 side to the recording restraint device c1.

By the way, if the replaced pair of change gears are not the same, the amount of rotational movement of the two barbrar cants will be different. For example, in module 2, if the constant gear 9 has 100 teeth and the change gear 6A has 80 teeth, the distance between the shafts of both gears 9 and 6A, that is, the straight distance between ll1t18 and the shaft 13 is 18Q 7#n. If a gear with one more (or fewer) teeth than the desired number of teeth 80 is used as the change gear 6A due to a mistake, the above ll
The distance between 1111 is 1817 nm (or 17 g nn
n). That is, if the change gear is replaced incorrectly, the amount of rotational shift of the two bar brackets 1 to 1 will be different, and the two output voltages V1. V2 is different. Therefore, the control device C1 holds the machine unstartable and sells the warning lamp. Therefore, even if the press button for driving the machine base is pressed, the machine base is not driven, and breakage of the bottom rollers 1, 2, and 3 due to incorrect change gear replacement is prevented.

Note that the control device C1 receives both of the output voltages Vl.

It includes a circuit to amplify the difference between the two outputs '1
Pressure V1. It is desirable to convert the difference in V2 to 0 at a certain value corresponding to the amount of gear shift. This conversion is possible by utilizing the characteristics of diodes.

In this example, a differential transformer was used as the tooth number detection device, but a 7-point yometer was used instead of the transformer.
The distance between the shafts may be measured based on the change in resistance value of the same meter. A linear encoder may be used to count the number of pulses depending on the amount of rotation of the lever bracket.

To explain based on this, the base end of the lever bracket 14 is provided with an arc-shaped toothed portion 14a centered on the shaft 10, and the toothed portion 1421 is provided with a rotary encoder 23.
A gear 24 fixedly attached to the rotation detection shaft 23-1 is meshed with the rotation detection shaft 23. The rotary encoder 23 has a rotation detection shaft 23f
The number of pulse signals corresponding to the rotation angle of l is emitted, and these pulse signals are sent to a control device (hereinafter referred to as C2) not shown. Therefore, when the change gear 6 is replaced with the change gear 6A in accordance with a change in the spinning conditions, a number of pulse signals corresponding to the rotational shift amount of the lever bracket 14 are sent from the rotary encoder 23 to the control device! J(:l! Sent to 2.

On the change gear 7 side, a similar mechanism consisting of a lever bracket 14 having a gear portion 14a, a gear 24, and a rotary encoder 23 is symmetrically provided, and the control device C2 controls the number of pulses from both rotary encoders. If there is a difference in the number of pulses, the machine is held unstartable and a warning lamp (not shown) is turned on.

As shown in FIG. 6, instead of the tooth portion 14a, an arc-shaped tooth portion 141 centered on the shaft 10 is provided at the tip of the lever bracket 14, and the rotary encoder 2
A gear 24 fixed to the 30-rotation detection shaft 23a may be engaged with the gear 24.

Also, a potentiometer may be used instead of the Lochley encoder.

By the way, in the first and second embodiments,
- When replacing the machine, the machine is held unstartable and a warning lamp is lit, but instead of this, the display device such as a warning lamp is omitted and the machine is held unstartable. Alternatively, although the machine can be activated at all times, the display device may be used to confirm whether there is a mistake in changing the change gear.

When the present invention is embodied in the draft roller mechanism shown in FIGS. 2 and 3, breakage of the bottom rollers 2 and 3 can be prevented in the draft roller mechanism shown in FIG.
In the draft roller mechanism shown in the figure, bottom roller 1
, 3 can be prevented from breaking, and the bottom roller 2 can be prevented from breaking.
It is possible to prevent the spinning conditions from being different between the A side and the 2B side.

Furthermore, in the draft roller mechanism shown in FIG. 7, if the change gears 4 and 5 are replaced incorrectly or the change gear 6.1 is replaced incorrectly, the bottom roller will not break, but the split bottom roller 2A will not break. Although the spinning conditions may be different between the 0III and 2B sides, it goes without saying that the above-mentioned defects can be solved by embodying the present invention in this draft roller mechanism. The same applies when the present invention is embodied in the draft roller mechanism shown in FIG.

Effects As detailed above, the present invention prevents replacement errors before starting the machine when changing the change gears in a gear machine installed at both ends of a long bottom roller in response to changes in spinning conditions. This can prevent the bottom roller from breaking due to incorrect replacement. In addition, in the case where an overload protection device is provided to prevent breakage or twisting of the bottom roller, the conventional defect that thread breakage occurs at most of the weights can be solved by the present invention. There is no need to worry about this at all, and the present invention is in line with the trend toward increasing the number of spindles in spinning machines in recent years.

[Brief explanation of the drawing]

This is a schematic diagram showing a trough roller machine RG. Bottom rollers 1, 2, 3, change gear 6.6A, +7
% Lever bracket 14, differential transformer 1 day as a tooth number detection device, rotary encoder 23° as a tooth number detection device

Claims (1)

[Scope of Claims] 1. In a draft roller drive mechanism in which at least one pair of bottom rollers among a plurality of bottom rollers are operatively connected at both ends thereof by a gear mechanism, the rotation speed ratio between the two bottom rollers is determined. A tooth number detection device is provided to detect the number of teeth of the change gears provided in each of the two gear mechanisms in accordance with a setting change, and when there is a difference in the detected number of teeth of the two change gears, the machine is held unstartable. 1. A draft roller drive mechanism for a spinning machine, characterized in that the draft roller drive mechanism is provided with a control device that issues a signal indicating that the detection result is displayed or the like. 2. According to claim 1, the control H1 device holds the machine base unstartable when there is a difference in the number of detected teeth of both change gears, and issues a display command to a device that displays the detection results. Draft roller drive mechanism in spinning machines. 3. The number of teeth detecting device is comprised of a lever bracket that supports the change gear and can be rotated with force, and a differential transformer that outputs a voltage according to the amount of rotation of the bracket. A draft roller drive mechanism in a spinning machine according to item 1 or 2. 4 The number of teeth detection device detects the AiJ lega lever bracket movement via a lever bracket that supports the change gear and can be rotated with force, and a gear that meshes with the teeth provided on the bracket. A trough roller drive mechanism in a spinning machine according to claim 1 or 2, comprising a rotary encoder for converting into a signal number.