JPS60110952A - Fluid pressure controller in fluid jet type 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 fluid jet loom having a main nozzle and sub nozzles, and more particularly to a device for regulating fluid pressure to the main nozzle and sub nozzles.

Prior Art Conventionally, the pressure of the fluid supplied to the fluid injection nozzle in this type of loom has been set under certain rules that take into consideration various conditions such as weaving width, yarn count, and weaving speed. Previously, the operator observed the actual weft insertion process and performed it manually.

However, with this method, the pressure is not necessarily regulated to ensure an appropriate weft speed and to minimize the consumption of injection fluid, and it is likely that a large amount of pressure will be required for each worker or each pressure adjustment operation. Since variations occur and this causes various problems that affect the quality of the woven fabric, it has been desired to adjust the pressure of the supply fluid more appropriately.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide a fluid pressure regulating device that can automatically adjust the pressure of fluid supplied to a main nozzle and sub nozzles in a fluid jet loom to an appropriate value that matches weaving conditions. be.

DESCRIPTION OF THE INVENTION For this purpose, the present invention, as clearly shown in FIG. A weft feeler is provided near at least the other end of the weft guide path in order to detect the arrival of the weft, and to detect the arrival of the weft. In a fluid injection type loom, the actual arrival time is determined based on the target arrival time input by means for setting the target arrival time from the start of weft jetting by the main nozzle until the weft reaches the weft filler, and the weft detection signal of the weft feeler. The comparison means compares the actual arrival time measured by the measuring means. As a result of the comparison, if the actual arrival time does not fall within the range of the target arrival time, the correction signal generating means transmits a correction signal. Since a means for setting the pressure relationship of the fluid is connected, each pressure regulating means of the main nozzle pressure regulating pulp and the sub nozzle pressure regulating pulp is driven according to the pressure relation by the correction signal, and the fluid pressure is adjusted. will be carried out.

Embodiment Next, a preferred embodiment of the fluid pressure regulating device according to the present invention will be described.

In Figure 8.2, a large number of plate-shaped weft guides are arranged in parallel in the sleigh 3 of the fluid injection type loom, and although not shown, each weft guide is provided with an opening 4Il with a slit. The openings q. are aligned with each other to define a weft guiding path along the sley 5. One end of this weft guide passage,
That is, a well-known main nozzle 1 is arranged so as to be aligned at the left end in FIG. 1, and a weft filler 3, which may be of a well-known type, is located at the other end of the weft guide path. Further, a large number of sub-nozzles are provided at appropriate locations along the weft guide path in a known manner, which assist the main nozzle I in flying the weft yarn LLI.

The main nozzle l is connected to the air tank B via a switching valve 13, and a large number of sub nozzles are grouped in a known manner, and the sub nozzles in each group are connected to the switching valve /Jl-/, /J'-,1. , 13'-, 3 to the air tank, and the switching valve /3n-/,/
,? It is connected to the air tank All through ``-, 2. In the case of a loom with multiple main nozzles,
By switching J, one of the plurality of main nozzles can be selectively connected to the air tank B. Also, switching valve/? By switching '-/~/J''-2 in a predetermined chronological sequence, each group of sub-nozzles can be connected to an associated air tank in said chronological sequence.

The above-described configuration of the fluid jet loom is similar to conventional ones. According to the present invention, an electronic control circuit // having the functions shown in the functional block diagram of FIG. a loom crank angle detector/, 2, and each air tank 4. Pressure regulating valve g, tl for regulating the pressure of the supply fluid to A+, 6*
Pressure regulating means (pressure regulating motor) 10, 10', 10" that drives to open and close the gll, and 6 pressures 7Jif
A pressure sensor, R1.R11, is connected to detect the pressure adjusted by H-y"grlC.

The crank angle detector may be a known type that rotates in synchronization with the crankshaft of the loom and transmits a digital signal representing the crank angle to the electronic control circuit, and a detailed explanation of its structure will be omitted. . 7 is a compressor as a fluid source.

Next, the configuration of the electronic control circuit 21 will be explained with reference to FIG. 3. The weft detection signal from the weft feeler 3 is input to the input boat 21I.

θ~-3 is an A/D converter, which respectively includes a crank angle, a set target arrival time until the weft/hiro reaches the weft feeler installation position, and a set initial pressure value of the pressure of the fluid injected from each nozzle. The set pressure relationship between each nozzle is converted into a digital signal and input to the input boat cog.

Ko! is a well-known microcomputer, with basic IC
It is composed of AM2A, OPU, 27, and ROM2g, and processes each signal outputted from the aforementioned A/D converters 0 to 23 to the input boat cog as necessary. The processed data is outputted to the output controller, converted into an analog signal by the D/A converter 3θ, and then sent to the pressure regulating motor 10,
10' and 10'' are applied.

Next, the operation of the fluid pressure regulating device of the present invention having the above-described configuration will be explained.

First, when adjusting the loom, the initial pressure value setting means sets the main nozzle pressure P1 and the sub nozzle pressure P.

and set P2. On the other hand, each pressure sensor 991,
91), the output value is compared with the set initial pressure value, and when both values match, a correction signal is output from the correction signal generation means, and the pressure adjustment means Motor 10°/θ1. /θn to adjust each pressure adjustment pulp Z, Zgn. This prepares the loom for operation.

During operation of the loom, the target arrival time setting means sets the target arrival time of the weft/Q to the set position of the weft filler J to, for example, 2900 in terms of crank angle. The weft feeler 3 generates a weft detection signal every time the weft is inserted, and the actual arrival time is measured based on this signal and the crank angle signal from the crank angle detector 12.

The actual arrival time and the set target arrival time are compared, and if they do not match, a correction signal is output, but the correction signal generation means is associated with pressure relationship setting means for setting the pressure relationship between each nozzle. Therefore, the correction signal is, for example, P=
= Ps, by 佽r P2” (”1+0.!r)
Based on a preset pressure relationship such as K17cm2, the pressure regulating motors /θ, /θ1. /θ■ to open and close each pressure regulating valve by a predetermined amount.

This adjustment operation is performed every time weft insertion unless the actual weft arrival time coincides with the set target arrival time.

Effects of the Invention As described above, the fluid pressure regulating device according to the present invention automatically adjusts the pressure of the fluid supplied to the main nozzle and sub nozzle each time weft is inserted, so the weft arrival time is measured for each machine and the By adjusting the supply pressure based on the value, (1) the fluid consumption of each machine can be ensured to the minimum required amount, resulting in energy savings; (2) the set pressure can vary depending on the operator. (3) There is no unnecessary high-pressure machine or low-pressure machine, which reduces weft breakage due to high pressure and delay in arrival time of cotton yarn due to low pressure. The following effects can be obtained: prevention of accidents and reduction of stoppages.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of a fluid pressure regulating device according to the present invention, FIG. 2 is a mechanical block diagram showing a specific configuration of the fluid pressure regulating device according to the present invention, and FIG. 3 is an electronic control diagram of FIG. FIG. 2 is a block diagram showing the configuration of a circuit. In the figure, 1 and / are the main nozzle, C is the sub nozzle, 3 is the weft feeler, the left is Slay, g, gI and gn are pressure regulating valves, io, io+ and 10I are pressure regulating motors, ll is electronic control circuit, 1.2 is the crank angle detector.

Claims (1)

[Scope of Claims] A main nozzle that can insert cotton into a weft guide path along the sley and aligned at one end of the weft guide path, and a plurality of sub nozzles provided at appropriate positions on the sley along the weft guide path. A fluid injection type loom is provided with a weft feeler at least in the vicinity of the other end of the weft guide passage in order to detect the arrival of the weft by a fluid injected from the main nozzle. means for setting the target arrival time until the target arrival time; means for receiving a weft detection signal from the weft feeler and measuring the actual arrival time based on the weft detection signal; means for setting a relationship between the pressure and the pressure of the fluid supplied to at least a certain group of the sub-nozzles, and means for comparing the target arrival time and the actual arrival time, and generating a correction signal based on the pressure relationship when they do not match. a pressure regulating pulp that regulates the fluid pressure to the main nozzle; a pressure regulating means that is connected to the pressure regulating pulp and the correction signal generating means and drives the pressure regulating valve based on the correction signal; Fluid pressure comprising: a pressure regulating pulp that regulates the fluid pressure to the group; and a pressure regulating means that is connected to the sub-nozzle pressure regulating pulp and the correction signal generating means and drives the sub-nozzle pressure regulating pulp based on the correction signal. Adjustment device.