JPH0248466Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a control device for alternatively selecting a plurality of weft threads.

Prior Art This type of weft thread selection device is used for multi-colored weft insertion, and generates weft thread selection signals sequentially based on a preset weft insertion order for a plurality of weft threads in relation to the rotation of a loom. . Therefore, the phase of this weft selection signal must always be synchronized with the rotational phase of the loom.

Therefore, the invention of Japanese Patent Application Laid-Open No. 59-211653 makes the phases match by subtracting the count pick number in the memory when there is a weft insertion error or when the loom is running idle. Furthermore, the invention of JP-A-59-211654 prevents updating of the count pick number in memory when a horizontal insertion error occurs.
Prevents phase shift.

However, in the above invention, the number of count picks in the memory is subtracted when operating in the forward direction, such as when a weft insertion error occurs or when the loom is idle, but when operating in the reverse direction, the number of count picks is subtracted. Must be subtracted manually. For this reason, it is troublesome to operate when the loom is running in reverse, and if you forget to operate the loom,
It is in a state where malfunctions are likely to occur.

Purpose of the invention Therefore, the purpose of the present invention is to always synchronize the phase of the weft selection signal with the rotation of the loom, regardless of the rotation direction of the loom, that is, the forward rotation direction or the reverse rotation direction.

Summary of the invention Therefore, the present invention determines the direction of rotation based on changes in the signal level, and selects a forward signal or a reverse signal for each rotation of the loom, depending on whether the loom is rotating forward or reverse. I'm trying to make it happen.
These forward signals and backward signals are each input to a weft thread selection control section, which sequentially and regularly generates weft thread selection signals in accordance with a weft insertion pattern that has been stored in advance. Therefore, not only when the loom is rotating in the forward direction, but also when the loom is rotating in the opposite direction for repairing the weft thread, the generation phase of the weft thread selection signal always matches the rotation of the loom. It will be synchronized with.

Structure of the Invention FIG. 1 shows the weft selection control device 1 of the invention in terms of functional blocks, and FIG. 2 shows a specific example thereof.

The weft selection control device 1 includes a rotation detection means 2, an operation command means 3, a rotation direction detection means 4, a selection control means 5, and a weft selection control section 6.

The rotation detecting means 2 detects the rotation of the loom and generates a rotation signal A for each rotation. For example, the rotation detecting means 2 detects the rotation of the loom and generates a rotation signal A for each rotation. Vessel 9
The comparator 10 is connected to the comparator 10. Further, the operation command means 3 receives the rotation signal A as an input and generates an operation command signal B when the signal level changes, for example.
This is realized by the CPU 11. Further, the rotational direction detection means 4 is for detecting the rotational direction of the loom and generating a rotational direction signal C having a different signal level for each rotational direction, and is used to assist a reversal push button switch or a reversal electromagnetic switch. It is constituted by a contact point 12.

The operation command means 3 and the rotation direction detection means 4 are both connected to the selection control means 5. This selection control means 5 receives the operation command signal B.
When the rotation command signal C is at the forward rotation level, for example, "L" level, a forward signal D is generated, and when the rotation direction signal is at the reverse rotation level, that is, at the "H" level, a backward signal E is generated. This is for generating an alternative, and like the operation command means 3, both are configured as a part of the CPU 11. The forward signal D and the backward signal E are input signals to the weft selection control section 6, respectively. The weft selection control section 6 stores the weft insertion pattern in advance, and receives the forward signal D or the backward signal E as input, and outputs, for example, a digital weft selection signal F to the plurality of output ends 13.
It is output as a combination of digital signals from the CPU 11, as well as the ROM 14,
It is composed of a RAM 15, an input port 16, a bus 17, an output port 18, and the like.

In the embodiment shown in FIG. 2, the necessary control program is input to the ROM 14, and the CPU 11
Based on the control program, the operation command means 3, selection control means 5 and weft selection control section 6
performs the functions of

Effects of the Embodiment First, FIG. 3 shows the level of the rotation direction signal C and the forward movement signal D in relation to the rotation signal A and the operation command signal B.
and the generation status of the reverse signal E.

Moreover, FIG. 4 shows the operation sequence of weft thread selection control.

When the main shaft 7 of the loom is rotating in the forward or reverse direction, the rotation detection means 2 detects the following for each rotation:
At a predetermined rotation angle, a rotation signal A of "H" level is generated. Therefore, the operation command means 3 constantly monitors the rising point of the rotation signal A, for example, and compares the current signal level with past signal levels to determine the point at which the level changes from "L" to "H". , at that point, an operation command signal B is generated and sent to the selection control means 5.

Therefore, the selection control means 5 determines the signal level of the rotation direction signal C from the auxiliary contact 12 of the reversal push button switch or the reversal electromagnetic switch as the rotation direction detection means 4. When the rotation direction signal C is at the "L" level, the selection control means 5 determines that the loom is rotating in the normal rotation direction, and sends the advance signal D to the weft selection control section 6. And vice versa,
When the rotation direction signal C is at the "H" level, the selection control means 5 determines that the rotation direction of the loom is the reverse direction, and sends a backward signal E to the weft selection control section 6. These forward signal D and backward signal E are output selectively depending on the rotational direction of the loom. Therefore,
The weft thread selection control section 6 selects the RAM 1 in advance based on the input of the forward signal D or the backward signal E.
The steps of the weft insertion pattern stored in step 5 are changed to the forward direction or the backward direction, and the weft thread selection signal F is sequentially outputted in synchronization with the rotating direction of the loom. Then, this digital weft selection signal F is sent to the weft selection device of the loom, which sequentially selects the selected weft from the multi-colored wefts, that is, a plurality of wefts, and enables weft insertion using the selected weft. Such judgments and processing are performed at high speed every revolution of the loom.

Modified example of the invention In the above embodiment, the CPU 11 etc. are explained as being dedicated to selecting the weft thread.
CPU11 etc. are control CPUs attached to the loom,
Alternatively, this can be done by using part of the loom's centrally managed CPU.

Effects of the invention In the present invention, the weft thread control means selectively sends a forward signal or a backward signal to the weft thread selection control section depending on the rotating direction of the loom. The weft selection signal is generated in synchronization with the rotational phase of the weft yarn selection signal.
Therefore, a correction operation or the like is not required for each direction of rotation of the loom, and multicolor weft insertion can be reliably performed, and malfunctions in weft thread selection can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the weft selection control device of the present invention, FIG. 2 is a block diagram of a specific example thereof, FIG. 3 is a time chart, and FIG. 4 is a flow chart. DESCRIPTION OF SYMBOLS 1... Weft selection control device, 2... Rotation detection means, 3... Operation command means, 4... Rotation direction detection means, 5... Selection control means, 6... Weft selection control section, 7... Loom Main axis.

Claims (1)

[Scope of utility model registration request] A rotation detecting means detects the rotation of the loom and generates a rotation signal for each rotation; an operation command means receives the rotation signal as input and generates an operation command signal when the signal level changes; and a rotation direction detecting means detects the rotation direction of the loom. rotational direction detecting means for generating rotational direction signals of different signal levels; The present invention is characterized in that it comprises a selection control means that generates an alternative signal, and a weft selection control section that receives the forward signal and reverse signal as input and sequentially generates a weft selection signal in accordance with a stored weft insertion pattern. Weft selection control device.