JPH0367134B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phasing device for a loom, and more particularly to an electrical control means for phasing or mouth alignment between the shaft of a loom and the shaft of a device constituting the loom.

BACKGROUND OF THE INVENTION When a weft insertion defect occurs during weaving, repair work such as pulling out the defective threads, so-called stitching work, is required, but generally it is necessary to reverse the loom for this work. At this time, when the rotation of the loom in the opposite direction is transmitted to a device constituting the loom, such as a weft yarn storage device, the stored weft yarn is rewound. It is set so that it is not transmitted to the weft yarn storage device side. Therefore, when resuming operation from the loom reverse stop position, it is necessary to align the rotational phase of the loom with the phase of the weft storage device.

PRIOR ART For example, the invention of the "hinoki loom" disclosed in Japanese Patent Application Laid-Open No. 57-101041 discloses a technique effective for such matching. Since the invention detects the angular position using a mechanical mechanism, the device has a mechanically complex structure. Furthermore, since one engagement position is always set in one repeating pattern, it is necessary to perform a mouth-aligning operation after repeating the pattern several times, which is complicated.

OBJECT OF THE INVENTION Therefore, an object of the present invention is to match the rotation angle of a loom and the rotation angle of a device that is disconnected from the loom main body during the matching operation by a combination of electrical means and mechanical means, or by a combination of electrical means and mechanical means. It is possible to perform position alignment even in an arbitrary repeating pattern by using only electrical means.

SUMMARY OF THE INVENTION Therefore, the present invention provides a clutch that is interposed between a driving shaft of a loom and a driven shaft that is driven by the driving shaft and that rotates a weft storage device. The operating section is controlled by an electrical arithmetic controller. This arithmetic controller compares the rotational speed (rotation angle) of the driving shaft and the driven shaft using electrical signals, and based on the comparison result, an auxiliary motor and the operating section for driving the driven shaft. I'm trying to control it. If such positioning control is performed electrically, the mechanical configuration of the device is simplified and the positioning of the weaving pattern can be performed at any repeating position of the weaving pattern.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

A phasing device 1 for a loom according to the present invention includes a driving shaft 2 on the loom side, a driven shaft 3 on the weft storage device 26 side driven by the driving shaft 2, and the driving shaft 2 and the driven shaft 3 on the weft storage device 26 side.
For example, a dog-type clutch 4 interposed between
It is equipped with This clutch 4 is composed of a pair of fixed body 5 and a movable body 6 that are engaged with each other by claws or teeth, and the fixed body 5 is fixed to the tip of the driving shaft 2, and the movable body 6 is Driven shaft 3
It is mounted so that it can slide freely in the axial direction and is prevented from rotating. This movement of the movable body 6 in the axial direction is performed by an operating section 7 such as a solenoid. In other words, the driver 8 of the operating section 7 is connected to the connecting pin 1
0 is connected to one end of the operating lever 9.
This operating lever 9 is rotatably supported at a fixed position by a support shaft 12, and has an interlocking pin 13 at one end.
The movable body 6 faces the inside of the groove on the circumference of the movable body 6, and is biased by a tension spring 11 in a counterclockwise direction, that is, in a direction in which the movable body 6 is engaged with the fixed body 5.

Rotating bodies 14 and 15 are attached to the driving shaft 2 and driven shaft 3, respectively, and rotation sensors 16 and 17 respectively correspond to these bodies in a non-contact manner. The rotation of the driven shaft 3 is transmitted to the intermediate shaft 21 by the pulley 18, the timing belt 19, and the intermediate pulley 20, and the rotation of the driven shaft 3 is transmitted to the intermediate shaft 21 by the intermediate pulley 22 and the timing belt 23.
is transmitted to the pulley 25 of the winding arm 24.

The weft yarn storage device 26 is connected to the winding arm 24.
In addition, a storage drum 27 is provided on the rotation center line of this winding arm 24. The winding arm 24 is a hollow body, and guides the weft thread 30 therein so as to sequentially wind the weft thread around the outer peripheral surface of the storage drum 27. The weft yarn 30 is locked by, for example, the upstream locking pin 28 of the two locking pins 28 and 29, and is wound around the outer peripheral surface of the storage drum 27 in an aligned state, but the downstream side When the locking pin 29 retreats from the outer circumferential surface of the storage drum 27, it is inserted into the weft through the weft guide 31.

Further, the phasing device 1 of the loom includes an auxiliary motor 32 with a speed reducer in order to phase the weft storage device 26. The rotation of the auxiliary motor 32 is transmitted to the driven shaft 3 by a one-way clutch 33, a torque limiter 34, pulleys 35, 36, and a timing belt 37. In addition,
The one-way clutch 33 is provided to prevent the rotation of the driven shaft 3 from being transmitted to the auxiliary motor 32 during normal operation, and the torque limiter 34 is provided to protect the motor from overload and prevent the loom from rotating. It is being

On the other hand, both the rotation sensors 16 and 17 are connected to an arithmetic controller 38 such as a computer. This arithmetic controller 38 inputs a set value N corresponding to the number of rotations per repetition of the weaving pattern and the number of rotations n and A obtained from the signals of the rotation sensors 16 and 17, and uses the formula [(N-n)-A ), and based on the calculation result, the normally closed contact 39 is turned on,
Performs off control. This contact 39 is connected to the power terminal 40
It is connected in series with a normally closed contact 41 which is interlocked with a loom reversing switch in a circuit connected to the loom reversing switch. One end of the auxiliary motor 32 is connected to one power terminal 40, and the other end is connected to the other power terminal by a first command switch 42, a second command switch 43, and a limit switch 44 connected in parallel. 40.

Effects of the Invention Next, the effects of the phasing device 1 of the loom will be described.

If an accident such as a weft insertion error occurs during weaving, the loom's stop device is activated and the loom is automatically stopped. When the worker turns on the loom reversing switch at the time of the matching operation, the contact 41 linked to this turns on and is maintained in a self-holding state, so that the operating section 7 By pulling , the operating lever 9 is rotated clockwise, and the movable body 6 of the clutch 4 is separated from the fixed body 5. As a result, the driving shaft 2 and the driven shaft 3 are mechanically separated, and the loom is then reversed. When clutch 4 is pulled apart a little, limit switch 4
4 is set to turn from off to on, so
This causes the arithmetic controller 38 to enter the operating state before the loom is reversed.

On the other hand, the arithmetic controller 38 has a weaving pattern 1 in advance.
The rotational speed N of the driving shaft 2 corresponding to the cycle is input. While the loom is reversing, the rotation sensor 16
detects the rotation speed n of the driving shaft 2 in the opposite direction from the loom stop position from the rotation sensor 16, and processes the signal.

Now, at the time when the reversal of the loom is completed due to the matching operation, the driven shaft 3 will be ahead of the phase of the loom main body by n rotations. Therefore, if the driven shaft 3 is reversed by n rotations, the phases of the driving shaft 2 and the driven shaft 3 will match.

However, if the driven shaft 3 cannot be reversed due to the nature of the weft yarn storage device 26, the driven shaft 3 is rotated (N-n).
If the rotation is made in the positive direction, the phases will match at that point.

Therefore, when the worker turns on the first command switch 42 for alignment, the first command switches 42, 43 and the limit switch 44 form a closed circuit including the power terminal 40, so the auxiliary motor 32 , starts immediately and transfers its rotation to the driven shaft 3.
Then, the winding arm 24 is rotated in the forward direction. The rotational speed A of this driven shaft 3 is detected by the rotation sensor 17.
and is sent to the other input terminal of the arithmetic controller 38 as an electrical signal. Therefore, the arithmetic controller 38 calculates the formula [(N-n)-A], and when [(N-n)-A] becomes less than 1, it generates the open signal C and turns off the contact 39. Set to state. Note that "1" in the above inequality corresponds to the fact that the clutch 4 engages only once during one rotation. Therefore, when the clutch 4 engages twice during one revolution, it is "1/2". becomes. At this point, the power supply to the operation part 7 is stopped, and the contact 4
1 also returns to the open state. In this way, the movable body 6 of the clutch 4 is biased by the tension spring 11 and tends to move towards the fixed body 5 and engage with it. However, since [(N-n)-A] is not 0, the clutch 4 is not yet engaged. In this state, limit switch 44
is still on, so the auxiliary motor 32
continues to rotate forward. When the clutch 4 is subsequently engaged, the limit switch 44 is turned off and the auxiliary motor 32 is no longer energized.

By the way, in the case of the above-mentioned weft yarn storage device 26,
Even if the driven shaft 3 is rotated by (N-n) rotations in the positive direction, the weft yarn storage state may not be completed completely. For example, this corresponds to a case where all the weft threads 30 on the drum are unwound. In such a case, the driven shaft 3 must be further rotated in the positive direction by (N) rotations.

Therefore, the second command switch 43 is set to the on state. At this time, the switch 41 is also turned on. Then, as in the case where the first command switch 42 is turned on, the auxiliary motor 32 rotates in the forward direction, and the arithmetic controller 38 calculates (NA), and similarly, if (NA) < 1. , an open signal C is output to the contact 39. The subsequent operation is the first
This is no different from the case of the command switch 42.

In this way, phase matching is possible by rotating either (N-n) or (2N-n). As is already clear, the first command switch 42 is (N-
This is a case where the phases are matched at the rotation point of n),
Further, the second command switch 43 is used to give the driven shaft 3 a rotation speed of N. Further, when the first command switch 42 and the second command switch 43 are simultaneously set to the on state, the auxiliary motor 32 gives the driven shaft 3 a rotation of (2N-n).

At this time, the arithmetic controller 38
A], and if the value is smaller than 1,
An open signal C is output to the contact 39.

If the worker cannot decide which one of the first command switch 42 and the second command switch 43 needs to be operated, first operate the first command switch 42, and then confirm that the weft yarn storage amount is insufficient. Then, the second command switch 43 can be operated. In this way, a total of (2N-n) rotations is obtained, so that the phases between the loom and the driven shaft 3 are perfectly matched. Through these three operations, the phase alignment of the weft yarn storage device 26 during the edge alignment operation is completed.

Modifications of the Invention In the above embodiment, a drum-type one is shown as the weft yarn storage device 26, but the weft yarn storage device 26
is not limited to the drum type. Further, the clutch 4 is not limited to a meshing type clutch, but may be an electromagnetic type clutch, for example.

Effects of the Invention In the present invention, since the matching state of the rotational phase of the device that is rotationally uncoupled with the loom main body during the matching operation is determined by an electrical circuit, the structure of the rotational drive system does not become complicated. , the phase matching device can be simplified. Further, since the arithmetic controller selectively performs calculations for mouth alignment depending on the situation of the mouth alignment work, appropriate positioning can be performed depending on the mouth alignment situation.

[Brief explanation of drawings]

The figure is a block diagram of a phasing device for a loom according to the present invention. DESCRIPTION OF SYMBOLS 1... Phase alignment device of a loom, 2... Drive shaft of a loom, 3... Driven shaft, 4... Clutch, 7... Operating unit, 9... Operating lever, 14, 15... Rotating body, 16, 17... Rotation sensor, 26... Weft yarn storage device, 32... Auxiliary motor, 33... One-way clutch, 38... Arithmetic controller, 42... First
Command switch, 43...Second command switch, 44
...Limit switch.

Claims (1)

[Claims] 1. A driving shaft that rotates in synchronization with the motion of the loom, a driven shaft that transmits the rotation of the driving shaft to the devices that make up the loom, a clutch interposed between the driving shaft and the driven shaft, and this clutch. an operating section for controlling the connection state of the driving shaft and the driven shaft, a rotation sensor provided on each of the driving shaft and the driven shaft and converting their rotation into electrical signals, and a system that uses the signals of these rotation sensors as input for phase alignment. calculate,
A phase adjustment device for a loom, comprising: an arithmetic controller that controls a power supply circuit for the operating section.