JP2587966B2 - Multicolor weft insertion control device for fluid jet loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a multi-color weft insertion control device for a fluid jet loom, and more particularly, a drive circuit controls a weft insertion portion in accordance with a command from a weft selection unit. The present invention relates to an improvement in a multicolor weft insertion control device in a fluid jet loom in which weft insertion is sequentially performed in a predetermined order from a plurality of main nozzles by sequentially and selectively driving.

(Prior Art and Problems Thereof) In the above-described type of fluid jet loom, during normal operation of the loom, weft insertion is performed in a regular weft insertion order in accordance with a command from the weft selection unit. However, when the loom is stopped, there is a case where, for example, in order to perform a weft pull-out repair operation from the main nozzle or the like, it may be desired to perform weft insertion only on an arbitrary specific main nozzle that does not follow the weft insertion order according to a command from the weft selection unit. However, in order to perform such a weft insertion in an arbitrary order, it is necessary to interrupt the weft insertion in a regular weft insertion order uniquely determined by a command from the weft selection unit.

In order to respond to such a request, the applicant of the present application has already filed Japanese Patent Application
In -146526, a new multicolor weft insertion controller was proposed. That is, in the prior invention, a signal temporary holding circuit is interposed between the weft selecting unit and the driving circuit, and the control box and the manual selecting unit of the loom are connected to the signal temporary holding circuit and the driving circuit. In accordance with a command from the weft selection unit, the drive circuit performs normal sequential weft selection, and when the loom is stopped, the drive circuit is given priority over the sequential weft selection and independently of the drive circuit in accordance with a command from the manual selection unit. The exclusive weft selection is performed.

By the way, in the case of multicolor weft insertion in a fluid jet loom, in addition to the interruption of the normal weft insertion order for repair work when the operation is stopped as described above, adjustment of the weft insertion state during normal operation of the loom In some cases, you may want to interrupt the normal weft insertion order. Adjustment of factors that influence the weft flight state, such as fluid pressure, fluid ejection timing, nozzle attitude, and nozzle ejection direction, is such.

In the case of one-color weft insertion, such adjustment can be performed while the loom is continuously operated while observing the actual weft flight state using a measuring instrument such as a stroboscope. However, in the case of multicolor weft insertion, since multiple wefts are inserted one after another according to the regular sequential weft selection, the flying state of only a specific order of the weft is continuously and repeatedly observed. It is not possible.

To solve such a problem, Jpn.
There is a proposal for the issue. That is, by operating the stroboscope in synchronization with only one specific weft signal, only the weft corresponding to the weft signal is selectively observed. However, depending on the contents of the regular sequential weft selection, not all wefts are always selected repeatedly in a short cycle, and some wefts are selected in a considerably long cycle. In other words, according to the proposal, the worker may wait for a long time until the target weft is selected, and it is difficult to predict the time at which the weft is selected. Can be very low.

By the way, in the case of the prior application by the applicant of the present invention, the switching of the weft selection mode between the normal operation and the stop is performed by the state (H, L) of the output signal from the control box of the loom. Therefore, any exclusive weft selection can be made during stop (output signal = H), but not during normal operation (output signal = L).

Another possible solution is to delete all the normal sequential weft selection patterns stored in the memory before adjustment from the memory, and create a new weft selection pattern in which only the weft to be adjusted is continuously selected. May be input to the memory. However, according to this method, it is necessary to input a regular sequential weft selection pattern into the memory again after adjustment, and there is a problem that the input operation becomes complicated as a whole.

(Summary of the Invention) The present invention provides a method for switching a weft selection mode from a regular sequential weft selection to an arbitrary exclusive weft selection at any necessary time irrespective of the operating state of a loom. In other words, it is an object to facilitate adjustment of the weft insertion state.

Therefore, in the present invention, a signal temporary holding circuit is interposed between the weft selecting unit and the driving circuit, the manual selecting unit is connected to the signal temporary holding circuit and the driving circuit, and a command is issued from the manual selecting unit. At this time, according to the command, the drive circuit performs an arbitrary exclusive weft selection prior to the normal sequential weft selection based on the command from the weft selection unit.

(Embodiment) FIG. 1 shows the overall configuration of a weft insertion system of a water jet loom incorporating the multicolor weft insertion control device of the present invention.

A signal temporary holding circuit 200 is interposed between the weft selecting unit 40 and the drive circuit 20 ', and the manual selecting unit PB' is electrically connected to the signal temporary holding circuit 200 and the drive circuit 20 '. I have. The drive circuit 20 'is electrically connected to the weft insertion unit 30 and the weft measuring devices RS1 to RSn. Weft W1-Wn
Are sequentially drawn out of the length measuring device by the action of the weft insertion part 30 composed of an electromagnetic valve or the like, and are sequentially inserted from the main nozzles N1 to Nn. These main nozzles N1 to Nn are fluidly connected to the weft insertion portion 30 as is known.

2 and 3 show an example of the detailed configuration of the weft insertion system. Each relay contact R1 to R5 in FIG.
The on / off control is performed by the relay sequence circuit of the manual selection unit PB 'shown in FIG. Each relay R1 in FIG.
R4 are operated by manual operation of the switches S1 to S4.

In FIG. 3, a dotted line connecting the switches S1 to S4 and SR indicates that the switch contacts are mechanically linked, and in this example, only one of the switches is exclusively selected by manual operation. It can be turned on all at once. Once any one of the switches S1 to S4 is turned on, the on state of the switch is mechanically maintained until another switch is operated or the reset switch SR is operated thereafter. It is.

During normal operation, the switches S1 to S4 are all off as shown in FIG. 3, and the relay contacts R1 to R5 are set as shown in FIG.

Therefore, the output signals (color signals) C1 to C4 from the weft selection unit 40 pass through the signal temporary holding circuit 200 as they are,
The signals are output as signals B1 to B4 via the relay contacts R1 to R4 of the drive circuit 20 '. Although the detailed configuration of the drive circuit 20 'and the weft insertion unit 30 driven by the drive circuit 20' are not shown, they are, for example, as described in the aforementioned Japanese Patent Application No. 62-146526. Therefore, based on the signals B1 to B4, wefts are selected along a regular sequential weft selection pattern, and are sequentially inserted.

At the time of weft insertion state adjustment, for example, the weft selected by the color signal C1 is adjusted.

In this case, the operator first operates the switch S1 of the manual selection section PB 'shown in FIG. Then, since the relay R1 of the same part operates, the relay contact R1 of the drive circuit 20 'is connected to the constant voltage power supply + V. Since the relay R5 also operates, all the relay contacts R5 of the signal temporary holding circuit 200 are turned off. Therefore, all of the color signals C1 to C4 from the weft selecting unit 40 are cut off by the signal temporary holding circuit 200. On the other hand, since only the relay contact R1 of the drive circuit 20 'is connected to the constant voltage power supply + V as described above, only the signal B1 is always output at the "H" level. As a result, independently of the normal sequential weft selection pattern, only the weft corresponding to the signal B1 is repeatedly selected and inserted.

When the adjustment of the weft insertion state is completed, the operator operates the reset switch SR, whereby the switch S1 of the manual selection unit PB 'is turned off. Accordingly, the relay contact R1 of the drive circuit 20 'is also disconnected from the connection with the constant voltage power supply + V, and returns to the state shown in FIG. That is, the state returns to the state at the time of normal operation.

FIG. 4 shows another example of the detailed configuration of the weft insertion system, in which the previous example is configured by a relay element, whereas this example is configured by a logic element. .

The signal temporary holding circuit 200 includes four AND elements,
The drive circuit 20 'is composed of four OR elements. The manual selection section PB 'is composed of five switches S1 to SR and one NOR element commonly connected thereto.

During normal operation, the color signals C1 to C4 are output from the weft selection unit 40 in accordance with the normal sequential weft selection pattern, and these are sequentially input to the signal temporary holding circuit 200 at the "H" level. On the other hand, at this time, since the switches S1 to SR of the manual selection section PB 'are all off, an "H" level signal is output from the NOR element. Therefore, an "H" level signal is input to both terminals of all the AND elements of the signal temporary holding circuit 200, and in response to this, signals B1 to B4 are successively output from the drive circuit 20 '.

At the time of adjusting the weft insertion state, for example, the adjustment is performed on the weft selected by the color signal C1. In this case, since only the switch S1 is turned on in the manual selection section PB ', the NOR element outputs an "L" level signal by the output signal from the constant voltage power supply + V. Therefore, the signal temporary holding circuit 200
Are cut off, and all the output signals thereof become "L" level. Looking at the OR element of the drive circuit 20 ',
An "H" level signal corresponding to the output signal of the constant voltage power supply + V is input only to the OR element (the top element in the figure) corresponding to the signal B1. Therefore, the drive circuit 20 'always outputs only the signal B1 irrespective of the regular sequential weft selection pattern, and only the corresponding weft is repeatedly inserted.

In each of the above embodiments, the case of a water jet loom is used, but it goes without saying that the present invention can be applied to the case of an air jet loom as it is.

(Effects of the Invention) As described above, according to the present invention, it is possible to switch from the regular sequential weft selection mode to an arbitrary exclusive weft selection mode at a necessary time regardless of the operating state of the loom. Adjustment of the weft insertion state (including repair work in a broad sense) can be easily performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a weft insertion system incorporating the apparatus of the present invention, FIGS. 2, 3 are block diagrams showing an example of a detailed configuration of the weft insertion system, and FIG. FIG. 11 is a block diagram showing another example. 20 '... drive circuit, 30 ... weft insertion part 40 ... weft selection part, PB' ... manual selection part 200 ... signal temporary holding circuit

Claims (1)

(57) [Claims] A weft selecting section (40) for outputting a command in a predetermined weft insertion order, and a drive circuit (20) for driving a weft insertion section (30) for wefting a corresponding weft based on the command. ′)
And a signal temporary holding circuit (200) is interposed between the weft selecting section (40) and the drive circuit (20 '), and the weft inserting section (30) A manual selection unit (PB ') for instructing the weft insertion of a specific weft is connected to the signal temporary holding circuit (200) and the drive circuit (20'), so that the manual selection unit is independent of the operation state of the loom. (PB '), the signal temporary holding circuit (200) temporarily holds the instruction of the weft selecting unit (40), and the drive circuit (20') sets the weft selecting unit (40) in accordance with the instruction. ). A multi-color weft insertion control device for a fluid jet loom, characterized in that an arbitrary exclusive weft selection is performed in preference to a regular sequential weft selection based on a command from (i).