JPH03227429A - Driving device of reed - Google Patents

Abstract

PURPOSE:To make it possible to flexibly correspond to various kind of wefts and fabrics having various weaving widths to carry out diversification by carrying out reciprocating rotation of a rocking shaft for driving a sley and sley reed by driving control of a variable motor arranged separately from a main motor of loom. CONSTITUTION:A variable motor provided separately from a main motor of a loom is subjected to driving control through a control device according to prescribed conditions to carry out reciprocating rotation of a rocking shaft arranged in lateral directions of loom. As a result, a sley provided with reed and sley reed which fixes the sley are subjected to driving control independently of main motion of the loom to increase number of degree of freedom for setting beating-up curve and make it possible to correspond to various kind of wefts and woven fabrics having width of wide range.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a reed drive device for a loom.

(Prior art) The longer the time for weft insertion in one cycle of the loom, the slower the weft insertion can be, which is advantageous in terms of weft supply, tension management, etc., and allows for higher quality fabrics to be obtained. .

However, if we simply start weft insertion earlier, the amount of retraction of the reed and the amount of opening of the warp at that time are small, so the weft or the weft conveyor is likely to come into contact with the warp, resulting in resistance from the warp. ■Damaging the warp threads,
Problems such as *cutting the warp threads and *disturbing the arrangement of the warp threads are likely to occur, and weft insertion errors are also likely to occur accordingly.

Therefore, in order to solve these problems, various improvements have been made in the past.

FIGS. 9 and 11 are examples thereof. Figure 9 shows what is called a multi-section link system, for example,
It is disclosed in Publication No. 247. In this method, the uniform rotational motion of the crankshaft 101 is converted into reciprocating rotational motion via the link mechanism 102, and the locking shaft 1
I have informed 03. In that case, connecting rod +1
2, the reed moves in an irregular manner as shown by the solid line, which is more advantageous in securing weft insertion time than the conventional reed movement using a crank mechanism as shown by the broken line in FIG. Further, FIG. 11 shows what is called a positive cam system, which is disclosed in, for example, Japanese Patent Publication No. 10662/1983. In this system, uniform rotational motion of the crankshaft 105 is converted into forward and reverse rotational motion and transmitted to the locking shaft 109 via a cam lever 108 sliding on positive cams 108 and 107. At that time, positive cam 106.107
By creating a resting angle in the weft angle, an irregular movement is performed which is advantageous in securing the weft insertion time as shown by the solid line in Fig. 1O.

(Problem to be Solved by the Invention) However, in the example shown in FIG. 9, the reed 104 appears to be stationary in its retreated position, but in reality it is vibrating, which causes a large amount of damage to each part of the device. It is easy to be burdened. For this reason, there are problems such as high power loss and considerable strength required for the parts.

Moreover, since the number of parts increases, the speed of the loom increases.
It cannot be said that it is a more suitable configuration. Also, in the example of Figure 11,
Positive cam 106.107 and cam follower 110 11
It is very difficult to prevent a gap from occurring all around the circumference, and when operating at high speed, this gap causes tremendous noise and heat generation. Therefore, this method cannot be said to be a configuration more suitable for increasing the speed of a loom.

Furthermore, if it is desired to weave by changing the weaving conditions such as the type of weft used or the weaving width, a drastic change such as a change in the resting angle at the reed retraction position is required. In that case, in the multi-joint link system, lever 112 and connecting rod 1
13, etc., in the positive cam system, positive cams 106 and 107.
It is necessary to replace the cam followers 110, 111, etc.

For this reason, it is often virtually impossible to change various weaving conditions, which is inconvenient.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a highly versatile method and device for driving a reed of a loom, which is suitable for higher speeds and can be adapted to more weaving conditions through smooth driving. is its purpose.

(Means for Solving the Problems) In order to solve the above problems, the present invention takes the following measures. That is, in the first invention, the sley and the sley sword are driven by the reciprocating rotation of a rocking shaft, and the drive system of the rocking shaft is a main motor that supplies power to each drive system of the loom other than the rocking shaft drive system. adopted the method of driving according to predetermined operating conditions by a separate variable speed motor. In addition, in the second invention, the apparatus for carrying out the method is equipped with a sled and a slay sword, and is configured independently of a drive system including a locking shaft disposed in the left-right direction of the machine and the main motor, and has a variable speed. The locking shaft drive system is driven by a motor and rotates the rocking shaft back and forth, and a control device drives and controls the variable speed motor according to predetermined machine operating conditions.

(Function) The function of the reed driving device of the present invention configured as described above will be explained.

The main motor referred to in the present invention particularly means a motor other than the motor that supplies power for driving the reed. A variable speed motor, which is a power source for a locking shaft drive system provided independently of each drive system driven by such a main motor, is driven and controlled by a control device. When the locking shaft rotates in the forward direction, the sled moves in the weaving direction, and beating is performed.

When the locking shaft rotates quickly, the sley moves toward the reed retracted position. The reciprocating rotation of the rocking shaft is brought about by a mechanism for switching the rotational direction of the locking shaft provided in the rocking shaft drive system, or by reversing the rotational direction of a variable speed motor.

Further, the speed and timing of beating the reed and the moving speed of the reed are easily managed and controlled by electrical control of the drive motor.

(Example) Hereinafter, an example embodying the present invention will be described based on the drawings.

<Embodiment 1> First, a first embodiment in which the present invention is applied to an air jet loom will be described based on FIGS. 1 to 4.

A thread sword 11 and a locking arm 15 are fixed to a locking shaft 10 which is disposed to be reciprocatingly rotatable along the left-right direction of the machine base so as to reciprocally rotate together with the locking shaft 10. Said Sleigh Sword 1
1 is provided with a weft insertion guide passage 14, and a sleigh 12 equipped with a so-called deforming liquid 13 is fixed thereto, and a tip end 22 of a connecting rod 21 is slidably disposed on the locking arm 15. Note that a normal reed may be used instead of the deforming liquid 13.

A base end portion 23 of the connecting rod 21 is eccentrically and slidably disposed on the crankshaft 20 . The crankshaft 20 is equipped with a variable speed motor 30 that can be controlled to change speed.
is driven by. At this time, the method of transmitting the driving force is not particularly limited (there are various methods such as using gears, using a chain, and using a rod, but in this embodiment, the driving force is transmitted using the timing belt 31.

The variable speed motor 30 is controlled by the control device 50 to
157. Detection signals from a rotary encoder 35 equipped to detect the rotation angle of the variable speed motor 30 and a rotary encoder 45 equipped to detect the rotation angle of the main motor 40 are input to the control bag RA50. It looks like this.

Next, a control circuit for driving and controlling the variable speed motor 30 will be explained based on FIG. 2. A microcomputer 51 constituting the control device 50 is a central processing unit (hereinafter referred to as CP).
) 52, a program memory 53 consisting of a read-only memory (ROM) storing a control program, and a C
The CPU 52 is comprised of a working memory 54 as a storage device consisting of a readable and rewritable memory (RAM) that temporarily stores the results of arithmetic processing in the PU 52, etc., and the CPU 52 operates based on program data stored in the program memory 53.

Various conditions related to weaving, such as weft type, weaving width,
An input device 55 for inputting machine rotation speed and the like to the microcomputer 51 is incorporated into the control device 50 as a keyboard.

The CPU 52 calculates the optimal reed movement for the conditions based on data such as the type of weft, weaving width, and machine rotation speed inputted from the input device 55 before machine operation starts. For example, when the movement shown by the solid line in the diagram of FIG. variable speed motor 30
A control signal is output to the speed change control device 57 to drive and control the variable speed motor 30 via the speed change control device 57.

The beating device of the loom of this embodiment is constructed as described above, and its operation will be explained below. Control device 5
In response to the operation command 0, the speed change control device 57 rotates the variable speed motor 30. When the variable speed motor 30 rotates, the belt 31, crankshaft 20, and hook rod 21
, the locking shaft 1 via the locking arm 15
0 is driven to rotate back and forth. slay sword 11
, the sled 12, and the reed 13 reciprocate together with the locking shaft 10 to perform reed beating. The position of the reed 13 is determined by a rotary encoder 3 attached to a variable speed motor 30.
5 is input to the control bag 7150 as a pulse signal corresponding to the position of the reed 13. Main motor 4
The operation of the machine base driven by the main motor 4
The control bag r is detected as a pulse signal corresponding to each operation detected by the rotary encoder 45 attached to the
1150.

The control device 50 controls the variable speed motor 30 according to the flowchart shown in FIG. 4 based on the optimal speed change beating curve that is calculated and stored based on various conditions related to weaving that are input into the working memory 54 before operation. to drive and control. Before the operation starts, the locking shaft and
Initial positioning with a main shaft driven by a main motor 40 (not shown) is performed. Next, after confirming that no machine stop command has been issued, the machine starts operating. The control device 50 constantly compares the pulse signals emitted from the rotary encoder 35 and the rotary encoder 45, and drives the rocking motor 30 while making fine adjustments as necessary so as to synchronize with the stored optimal speed change beating curve. Control. If some abnormality occurs in the machine and a command to stop the machine is issued, or if the operator issues a command to stop the machine, the machine stops and enters a standby state. When the machine restart command has been issued and the machine malfunction has been eliminated, operation will resume from the initial alignment of the locking shaft and main shaft.

In order to ensure that weft insertion is performed reliably, it is desirable that the reed not move much while the weft is flying. According to the apparatus of this embodiment, the movement of the reed can be adjusted according to the ease with which the weft threads used are likely to fly.

Furthermore, since the proportion of time occupied by weft insertion in one cycle can be adjusted, it is possible to weave many types of fabrics with a single loom. Furthermore, since the configuration of the beating device drive system is simpler than that of the conventional variable speed beating mechanism, it is advantageous in terms of suppressing heat generation, noise, vibration, etc., and improving efficiency. Because of this, even higher speed operation becomes possible.

<Embodiment 2> Next, a second embodiment in which the present invention is similarly applied to an air jet loom will be described based on FIGS. 5 and 6.

In this embodiment, a motor capable of rotating in both forward and reverse directions, such as a servo motor 32, is used as the variable speed motor, and accordingly, the structure of the beating device drive system is different from that of the device of the first embodiment. There is.

In FIG. 5, a locking shaft 10 rotatably disposed along the longitudinal direction of the machine includes a slay-sort 1
1, sled 12, and reed 13 are arranged in the same manner as in the first embodiment. The locking shaft IO is a servo motor 32
Accordingly, in this embodiment, it is driven via a timing belt 33. At this time, the method of transmitting the driving force is not limited to the timing belt, as described in the first embodiment.

The control circuit 50 for driving and controlling the servo motor 32 operates according to the flowchart shown in FIG. This flowchart differs from the flowchart in FIG. 4 in the control portion for reciprocating the locking shaft 10, but is otherwise generally the same. When the machine starts operating, the angle θ of the main shaft is integrated based on the pulse signal from the rotor encoder 45. After confirming the presence or absence of a machine stop command, the direction of rotation of the locking shaft is determined. For forward rotation, θ>θl, for backward rotation, θ>θ
2, the rocking motor is controlled so as to be synchronized with the stored optimal speed change beating curve. Here, θ1
is the angle of the main shaft at the moment of beating the reed, and θ2 is the angle of the main shaft at the moment when the reed starts to move from the retreated position toward the weaving area. The angle of the main shaft is θ
1 or θ2, a reverse rotation command is issued to the servo motor 32, and the direction of reciprocating rotation of the rocking shaft is changed.

Other configurations are similar to the first embodiment.

<Embodiment 3> Next, based on FIG. 7, a third embodiment in which the present invention is similarly applied to an air jet loom will be described.

The structural feature of this embodiment lies in the part related to the supply of weft insertion, and the other structures are the same as those of the first or second embodiment. A nozzle holder 60 is fixed to one end side (weft insertion side) of the locking shaft 1O, and is used for two weft insertions for injecting weft yarns Yl and Y2 supplied from a weft supply source (not shown) into the weft guide path 14. Nozzle 6
1 and 62 are housed in the nozzle holder 60. The weft insertion nozzle 61 is connected to a compressed air supply tank 67 via a flexible supply vibro 3 and a solenoid valve 65, and the weft insertion nozzle 62 is connected to a compressed air supply tank 68 via a flexible supply vibro 4 and a solenoid valve 66. has been done.

Now, in response to an operation command from a weft insertion control circuit (not shown) following a preset weft insertion pattern, the electromagnetic hull
．． 66 is opened, and the insertion order of the wefts Yl and Y2 can be freely selected.

In such a device, two weft insertion nozzles 61.
62 injection pressure can be controlled independently, and the beating curve can be freely set as described in each of the above embodiments, the types of weft yarns Yl and Y2 are not limited to those with relatively similar properties, but can be completely changed. They may be different, for example cotton thread and silk thread. That is, when using cotton thread or when using silk thread, the desired beating curve pattern may be different in each case as shown in FIG. According to the present invention, the beating curve is changed and controlled according to the weft used in accordance with a preset weft insertion pattern.
It is possible to weave fabrics using multiple weft yarns in combinations unimaginable with conventional looms.

The configuration of this embodiment is not limited to the above, but may include three or more weft inserting nozzles and, for example, adding yarn showing the desired beating curve pattern to FIG. 8. , three or more types of weft yarns may be used for weaving.

It should be noted that the present invention is not limited to the above embodiments, and may be applied to non-threaded looms or woven looms other than air jet looms. In addition, the rotary encoder 35
may be attached to the crankshaft 20 or the locking shaft 10, or other detection means such as a resolver may be used instead of the rotary encoder. The same applies to the rotary encoder 45, and it is possible to attach it to the main shaft or use other detection means such as a resolver. Furthermore, in the control device 50, several kinds of beating curve patterns, for example, about three kinds of patterns as shown in FIG. 8, are stored in a program memory 53 in advance.
Alternatively, the input device 55 may be omitted and the system may be simplified so that the system always operates according to a constant variable speed beating pattern.

(Effects of the Invention) As detailed above, according to the present invention, various problems such as heat generation, noise, vibration, poor efficiency, etc. caused by conventional reed driving methods and devices are solved, and weaving machines can be further improved. enables high-speed operation. In addition, it is possible to use many types of weft yarns, a wide range of weaving widths, and fabrics that were previously unimaginable.
You can get a vine loom that is flexible. Furthermore, in the present invention,
Since the reed is electrically controlled independently of the other main moving parts of the loom, the degree of freedom in setting the reed beating curve is greatly increased. Therefore, it is possible to weave a fabric with a combination of weft yarns of a type that was not possible in the past.

As described above, the present invention brings about very useful effects.

[Brief explanation of drawings]

1 to 8 show embodiments of the present invention, FIG. 1 is a side sectional view schematically showing the reed beating device of Embodiment 1, and FIG. 2 is a control of the reed beating device of Embodiment 1. An electrical block diagram of the device, FIG. 3 is an example of a beating curve showing the relationship between the main shaft and reed positions of the loom of the first embodiment, and FIG. 4 is a flow chart showing the operating procedure of the loom of the first embodiment. Fig. 5 is a side sectional view schematically showing the reed beating device of the second embodiment, Fig. 6 is a flowchart showing the operating procedure of the loom of the second embodiment, and Fig. 7 is the weft inserting device of the loom of the third embodiment. FIG. 8, which is a partial perspective view schematically showing the part shown in FIG. 8, is an example of beating curves corresponding to different types of wefts. FIGS. 9 to 11 are drawings showing a conventional reed beating device, in which FIG. 9 is a side sectional view schematically showing a multi-joint link system, and FIG. 10 is an example of a conventional reed beating curve. , FIG. 11 is a side sectional view schematically showing the positive cam system. 10° rocking shaft I: Sleigh sort 12: Sleigh 30, variable speed motor 32: Servo motor 40 Main motor 50: Control device

Claims (2)

[Claims] (1) The sleigh and sleigh sword are driven by the reciprocating rotation of a rocking shaft, and the drive system for the rocking shaft is driven by a main motor that supplies power to each drive system of the loom other than the rocking shaft drive system. A method for driving a reed of a loom using a variable speed motor according to predetermined operating conditions. (2) Equipped with a sled and a sled sword, the locking shaft is arranged in the left and right direction of the machine, and is configured independently of the drive system by the main motor, and is driven by a variable speed motor, and is driven by a variable speed motor, and drives the rocking shaft in reciprocating rotation. 1. A reed drive device for a loom, comprising: a locking shaft drive system for controlling the variable speed motor; and a control device for controlling the drive of the variable speed motor according to predetermined machine operating conditions.