JPS60162841A - Warp yarn feed-out method of loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a warp delivery method for a machine. More specifically, the present invention connects a warp beam to a drive source of a loom through a continuously variable transmission whose transmission ratio changes according to warp tension and a rotational direction switching mechanism connected to the output side of the continuously variable transmission. The present invention relates to a warp delivery method in a l*III warp delivery mat.

Description of the prior art The applicant of this patent application developed a warp tension device as a warp delivery device that enables the warp beam to be actively reversed when one machine is reversed in cases such as when correcting weaving flaws. We have proposed a warp delivery device for a loom in which a warp beam is connected to the drive source of the loom via a continuously variable transmission whose gear ratio changes according to the speed change and a rotational direction switching mechanism connected to the output side of the continuously variable transmission. .

The continuously variable transmission is preferably one that can continuously change speed from zero rotation to maximum rotation regardless of whether the vehicle is running or stopped.
For example, the material sold by Miki Pulley Co., Ltd. under the trademark Zeromax can be used.

Such a continuously variable transmission has a structure in which the output shaft rotates only in the forward direction even when the rotation direction of the machine drive source connected to the input shaft is in the forward or reverse direction.

For this purpose, in the above-mentioned warp delivery device, a drive bevel gear is provided on the output side of the continuously variable transmission, and during forward rotation, the drive bevel gear is engaged with the forward rotation bevel gear of the rotation direction switching mechanism by spring force. and a forward rotation clutch connected to the forward rotation bevel gear to drive the beam gear,
The warp beam is rotating forward. On the other hand, at the moment when the machine is reversed due to thread breakage, etc., the electromagnetic solenoid is energized, or the solenoid valve is opened and the pneumatic cylinder is activated, the lever is rotated, and the bell gear is engaged with the reversing bevel gear to drive. In addition, the warp beam is reversed by engaging the reversing clutch connected to the reversing bevel gear. However, the continuously variable transmission has an internal crank lever mechanism and a one-way transmission mechanism, and the loom's drive shaft is The transmission ratio changes depending on the rotation direction.

Therefore, even if the gear ratio is set to the same, the rotation speed of the output shaft will be different when the input shaft rotates forward and reverse, and the warp beam The number of rotations will be different.

Furthermore, the ratio of the output rotation speeds during forward rotation and reverse rotation is not always constant, but changes depending on the load applied to the output shaft according to the warp beam diameter. In addition, warp feeding devices often use a worm mechanism between the rotation direction switching mechanism and the warp beam, and therefore the torque differs depending on the worm during forward and reverse rotation. As a result, even if the same gear ratio is set, the output shaft rotation speed is different when the input shaft rotates forward and reverse. , the rotation speed of the warp beam will be different.

For this reason, even if the warp feeding device proposed earlier is used, the amount of unwinding of the warp beam when the machine is reversed cannot completely match the amount of warp beam unwinding before reversing. First, there is a concern that abnormalities such as stoppages may still occur because of this.

Purpose of the Invention In view of the above-mentioned problems, the present invention is capable of substantially matching the sending amount and the rewinding amount of the warp beam when the machine is rotated in the forward and reverse directions, thereby preventing abnormalities such as stop stages. It is an object of the present invention to provide a warp delivery method that does not cause warp threads.

Structure of the Invention In the present invention, the warp beam is connected to the drive source of the loom via a continuously variable transmission whose gear ratio changes according to the warp tension and a rotational direction switching mechanism connected to the output side of the continuously variable transmission. In the warp delivery mechanism of the connected looms, the switching mechanism is operated during restart and when the loom rotates in reverse and forward rotation to detect the difference in the amount of delivery due to the rotation speed ratio on the output side during forward and reverse rotation of the continuously variable transmission. The above-mentioned object is achieved by a warp delivery method of a loom in which the warp beam is rotated in reverse and forward direction while correcting.

If the rotation speed ratio of the continuously variable transmission output shaft when the input shaft is rotated forward and reverse is 1:a (however, a>1), looking at the rotation of the #All drive shaft (crank shirt 1-), The rotation switching mechanism is operated as follows. When the loom rotates in the reverse direction, as a correction amount, (a-1)/(a+1) rotations are first sent to the forward rotation side, then reversed, and when the loom rotates in the forward direction, the warp beam of the loom is sent out so that the warp beam rotates in the forward direction. is preferred.

In addition, if the rotation speed ratio when the input shaft of the continuously variable transmission is rotated in the forward and reverse directions is 1:b (however, b minus 1), the rotation switching mechanism should be Operate as follows. When the loom rotates in reverse, the warp beam is reversed, and then when the loom rotates forward for 1 m, the warp beam is first rotated.
As the correction amount, (1-b)/(1+b) rotation is reversed,
Next, it is preferable to send out the warp of the Ila machine so that it rotates normally.

DESCRIPTION OF EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. 1st
The figure shows l1tI for carrying out the warp delivery method of the present invention.
This is a front view of the warp beam drive system of the machine, showing the drive shaft of the machine (
crankshaft) 1 and input shaft 5a of continuously variable transmission 1115
are connected by a belt 4. The output shaft 5b of the continuously variable speed tl15 and the drive bevel gear 8 are connected to the change gear 6.7.
It is connected by

The code 5G is a gear ratio change lever of the continuously variable transmission 5,
The gear ratio is changed according to the warp tension.

Next, the rotation direction switching mechanism will be explained. A rotating cylinder 10 is spline-coupled to the rotating shaft 9 so as to be slidable in the axial direction, and a bevel gear 11 for normal rotation and a bell gear 12 for reverse rotation are fixedly attached to the rotating cylinder 10.

The tip of a lever 13 is engaged with an annular groove 10a formed in the rotation circle n10, and a spring 14 and a piston rod 15a of an air cylinder 15 are connected to the lever 13. Reference numeral 16 is an electromagnetic valve that controls the operation of the air cylinder tI11, and 17 is a controller consisting of a computer, which controls the operations of the parts shown in FIG. 1, including the electromagnetic valve 16. Clutches 18 and 19 connect the forward rotation bevel gear 11 and the reverse rotation bevel gear 12 to the rotating shaft 1o, respectively.

For forward rotation, the driving bevel gear 8 is engaged with the bevel gear 11 for forward rotation of the rotation direction switching mechanism by the spring force of the spring 14, and the clutch 18 for forward rotation connected to the bevel gear 11 for forward rotation is engaged, and the worm gear 20 and the worm wheel 2 are connected.
1. Drive the beam gear 23 in the normal rotation direction via the gear 22 to rotate the warp beam 24 in the normal rotation direction.

On the other hand, when reversing the machine due to thread breakage, etc., the air cylinder 15 is actuated by the electromagnetic valve 16, the lever 13 is rotated, the driving bevel gear 8 is engaged with the reversing bevel gear 12, and the reversing bevel gear 8 is rotated. The warp beam 24 is reversed by connecting the reverse clutch 19 connected to the reverse rotation clutch 19 .

However, if the rotation direction of the warp beam was reversed by a rotation direction switching mechanism in one-to-one correspondence with the reversal time of the machine base, the warp beam would The rewinding of the beam was not appropriate and a stop step was created.

In other words, if the rotation speed ratio of the output shaft 5b when the input side 5a of the continuously variable transmission is rotated 1° forward and reversed is 1:a (however, a>1), then the reversal time of the machine and the one-to-one ratio If the rotational direction of the warp beam is reversed by the rotational direction switching mechanism in response to this, the warp beam will be rewound too much.

As a countermeasure against this, in the present invention, even if the machine base is reversed, the rotation switching mechanism is not activated and the warp beam is rotated forward by a predetermined angle (Xo) as seen from the input shaft 5a of the continuously variable transmission, and then the rotation switching mechanism Activate to reverse the warp beam,
Rewinds the warp beam by an amount equal to its previous sendout.

Since the warp yarns are sent out in synchronization with the rotation of the machine, the drive shaft 1 of the machine spindle rotates 360 degrees during the -th feed, so the above x0 is 360 degrees + x '' - a (360'' - ” ), then x = 360” X (a-1)/(a +1).

In other words, when looking at the drive shaft 1 of the machine, from the time the drive shaft 1 starts rotating until it rotates by (a −1)/(a +1), the rotation switching mechanism is set to normal rotation, and (a −1> /
(a +1) After rotation, the rotation of the drive shaft 1 of the machine is detected by a rotary encoder 25 provided on the shaft, and the operation of the electromagnetic valve 16 is controlled by a controller (computer) 17. do.

When the input side 5a of the continuously variable transmission is rotated 1° forward and reversely, the rotation speed ratio of the output shaft 5b is 1:b (However, b
In the case of <1), if the rotation direction of the warp beam is reversed by the rotation direction switching mechanism in one-to-one correspondence with the reversal time of the machine, the amount of rewinding of the warp beam will be insufficient.

As a countermeasure against this, in the present invention, even after the drive shaft (crankshaft) 1 of the machine completes reverse rotation and starts normal rotation, the rotation switching mechanism is not activated immediately, and the drive shaft 1 is rotated at a predetermined angle (yo ) Continue to rotate the warp beam in reverse until it rotates, then switch the rotation switch tI to rotate the warp beam in the normal direction to match the phase of the warp beam during subsequent steady transmission.

Here, when the input shaft of the continuously variable transmission is rotated once, the missing unwinding stone is 360' (1-b), and the input shaft is further reversed by y° and rewinded by Vb'', and the total Since the insufficient rewind amount of is equal to the angle y° at which the start of normal rotation is delayed, the above V.

is determined from 360° (1-h)-yb'' = y' to y = 360' x (1-b)/(1+b).

In other words, when the drive shaft 1 of the machine base starts rotating, the rotation switching mechanism reverses the warp beam, and even after the machine base rotates in the normal direction, the machine base continues to rotate (1-b)/(,1+b). Continue to set the rotation switching mechanism to the reverse side until (1-b)
/(1+b) so that after rotating, it switches to the forward rotation side.
The rotation of the drive shaft of the machine is detected by the rotary encoder 25 provided at 0, and the rotation is detected by the controller (computer) 17 at 1.
m to control the magnetic pulp 16.

Effects of the Invention In reality, the rotation of the drive shaft of the machine is detected using pulses transmitted by the rotary encoder, so the detection accuracy is determined by the slit interval of the rotary encoder, and is within the range of 5 degrees or 2.5 degrees. °. However, by setting the above-mentioned forward/reverse ratios 1:a and 1:b for each operating condition in advance, the shift of the warp beam when the machine is reversed can be almost eliminated, and the stop stage of #AtI can be substantially reduced. A high-quality woven fabric can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a warp beam drive system of a loom for carrying out the warp delivery method of the present invention. 1... Drive shaft of machine base, 5... Continuously variable transmission, 5a...
・Input shaft, 4... Belt, 5b... Output shaft, 8... Drive bevel gear, 9... Rotating shaft, 10...
・Rotating cylinder, 11... Bevel gear for forward rotation, 12...
・Bell gear for reverse rotation, 10a... annular groove, 13... lever, 14...
Spring, 15...Air cylinder, 15a...Piston rond, 16...Solenoid valve, 17...Controller, 23...
Beam gear, 24... Warp Beam Patent Applicant Co., Ltd. Toyota Automatic Machinery Works Patent Application Agent Patent Attorney Eiji Sanaka Patent Attorney Kikue Yamamoto Engraving of the drawing (inner L: Do not change this - Figure 1 Procedures ?m official document (method) February 76, 1982 1. Indication of the case 2. Name of the invention Warp sending method for a loom 3. Relationship with the case by the person making the amendment Name of the patent applicant (321) Toyota Automobile Co., Ltd. Loom Seisakusho 4, Agent Address: 601 Nikko Palace Akihabara, 2-3-7 Taito, Taito-ku, Tokyo 110 Japan

Claims (1)

[Claims] 1. The warp beam is connected to the drive source of the loom through a continuously variable transmission whose gear ratio changes according to the warp tension and a rotational direction switching mechanism connected to the output side of the continuously variable transmission. In the warp delivery mechanism of the m-machine, the difference in the delivery amount due to the rotational speed ratio on the output side during forward and reverse rotation of the continuously variable transmission is determined by operating the switching mechanism during reversal of the loom when restarting and forward rotation of the loom. A warp delivery method for a loom, which is characterized by rotating a warp beam in reverse and forward direction while correcting. 2. The rotation speed ratio during forward and reverse rotation is 1:a (however, a>1
), looking at the rotation of the drive shaft of the loom, first, when the 14 looms are reversed, the correction port ratio is (a-1)/(a+1) to the forward rotation side, then the loom is reversed, and then the 41 looms are sent to the forward rotation side. 2. The warp delivery method for a loom according to claim 1, wherein the warp beam is rotated in the normal direction during normal rotation. 3. The rotation speed ratio during forward and reverse rotation is 1:b (however, b<1
), the warp beam is reversed when am reverses, and then when the loom rotates forward, it is further reversed by (1-b)/(1+b) as the ratio of the correction amount in terms of the rotation of the loom's drive shaft, The am warp delivery method according to claim 1, which then rotates normally.