JPS6028552A - Length measuring and amount control apparatus of weft yarn length measuring apparatus - 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 length measurement amount adjusting device for a drum type weft length measuring device that measures the length of a weft thread to be inserted in a fluid jet loom.

(Prior Art) As a conventional device of this type, Japanese Patent Laid-Open No. 57-29640 is known. However, this device has an incomplete length measurement adjustment function that corresponds to changes in the paper, so when changing the line width, it is necessary to replace the drum with a drum that is compatible with the paper each time, making the work complicated. The lack of becoming. There is a point.

(Purpose) The present invention has been made to solve the above-mentioned drawbacks,
The purpose is to make it extremely easy to adjust the amount of length measurement based on changes in the paper.

(Structure) In order to achieve the above-mentioned object, the present invention includes a length measuring circuit that winds and stores a weft yarn around a stationary drum, counts the number of unwindings of the weft yarn, and transmits an activation signal based on the counted number. In the weft length measuring device, the weft thread length measuring device is provided with a weft thread locking body that is provided and operated in response to an activation signal, and the weft thread locking body is provided so as to be rotatable around a stationary drum, and the weft thread locking body is configured to lock the weft thread every cycle of the loom. The body is configured to rotate at a predetermined angle around a stationary drum.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a frame of a fluid jet loom, 2 is a nozzle holder that is erected on the frame 1 and fixed with bolts 8, 4 is a weft insertion nozzle attached to the holder 2, 5 is a stay protruding from the outside of the holder 2, 6 is a weft guide provided on the stay 5 on the axis of the weft insertion nozzle 4; 7 is a weft; the weft 7 is guided by the guide 6 and drawn through the nozzle 4, and is sprayed from the nozzle 4 during weft insertion. The weft is inserted into the opening of the warp (not shown) by the air generated.

Also, 8 is a bracket fixed to the outside of the frame 1 with bolts 9, and 10 is a pole attached to the tip of this bracket 8.
The bearing is fixed and stood up in step 1, and the boss at the top is 0.
A rotary shaft 1 is connected to the rotary shaft 1 through two ball bearings 12 in a.
B is supported.

A toothed pulley 14 is fixed to the shaft 1B via a key 15, and the rotary shaft 13 rotates eight times per one rotation of the loom via a toothed belt (not shown).

Further, 16 is a stay fixed to the side surface of the bearing 10, j
7 is an air injection nozzle for drawing the weft thread, 18 is a rotating shaft 13
A thread guiding hole 19 is provided inside the thread guiding hole 19, which communicates with the deep part of the thread guiding hole 18, and a thread guiding tube which projects outward from the shaft 18, 20 is a lock nut thereof, and 21 is a base fixed to the thread guiding tube 19. ,hand,
This is a thread guide whose tip end is inclined toward the stationary drum side, which will be described later, and 2z is a guide hole provided at the tip end.

In addition, 2B has a protruding shaft portion 1.8a that is integrated with the rotating shaft 18,
A drum support body is rotatably provided via two ball bearings 24, and a stationary drum 25 is fixed to a rear flange 28a of this support body 28 with bolts z6. 27
is a weight fixed to the drum 25 by one long bolt 26 of these bolts 26, and even if the rotary shaft 18 rotates due to the action of the weight z7, the drum 25 will not move due to the weight 27.
is at rest at the lowest position. Reference numeral 28 denotes a disc-shaped thread guide fixed to the front flange of the drum support 28 with Z8bK screws Z9. The outer circumferential surface of the stationary drum 25 has a tapered portion 25a whose outer diameter increases (decreases) toward the guide 6 at a portion close to the guide hole z2 of the thread guide 21.1.
The tapered portion 25a has a straight portion 251 whose diameter is approximately the same (it is actually slightly tapered with a retainer attached) from the minimum diameter portion toward the edge of the drum on the guide 6 side.

In this actual hs example, a ring-shaped support 8 is mounted on the bracket 8.
A plurality of (four in this embodiment) guide rollers 81 are rotatably provided inside the support body 80, and an annular groove 82a into which these guide rollers 81 fit is formed on the outer peripheral surface. A cylindrical cover 82 with a gear 88 integrally formed on the rear outer periphery is rotatably provided via a guide roller 81, and a gear 84 that meshes with a gear 83 is fixed to a support 30. By driving the cover 82, the cover 82 can be rotated.

Further, an annular groove 86 is provided at the front edge of the straight portion 25b of the stationary drum 25, and the electromagnetic actuator 37 is fixed to the cover 82 so as to face the annular groove 86.
When the actuating rod, that is, the weft locking body 88 is protruded, it projects into the annular groove 86.

Further, a thread sensor 89 integrated with a light emitter and receiver is installed through the cover 82 and detects the weft thread 7 by receiving the light from the light emitter reflected by the weft thread 7 on a light receiver.

In addition, 40.41 is a slip ring provided on the cover 82,
Reference numerals 42 and 413 designate brushes that flow current from the control circuit to the slip rings 40 and 41, and 44 and 45 designate brushes that are connected to the actuator 39 and are in sliding contact with the slip rings 40 and 41.

FIG. 8 shows an example of the control circuit of this device.
0 is an amplifier, 51 is a crank angle sensor, 52 is a detection period instruction circuit, 58 is a pulse instruction signal generator, 64 is a pulse number setting circuit, 55 is a pulse generation circuit, 56 is a driver, 57 is a count number setting circuit, 58 is a counter, and 59 is a driver.

The electromagnetic actuator 87 is excited at a predetermined angle of the main shaft of the loom, pulls out the weft locking body 88 from the annular groove 86 against the spring force of the actuator 87, counts the yarn presence signal from the yarn sensor 89, When it reaches a predetermined number, it is deenergized by a signal from a circuit that issues an activation signal, causing it to plunge into the groove 86. Further, the step motor 85 is caused to rotate by a predetermined angle while the locking body 88 is not locking the weft thread 7 by the control circuit.

That is, in FIG. 8, the pulse instruction signal generation circuit 5
8 is an angle signal from the crank angle sensor 51 of the loom main shaft in order to detect the first signal from the thread sensor 89;
It is controlled by a detection period signal from a detection period instruction circuit 52. When the pulse instruction signal generator 58 receives a signal from the amplifier 50, it emits a signal. In response to this signal, the pulse generating circuit 55 sends the number of pulses set by the pulse number setting circuit 54 to the driver 56, thereby causing the step motor 85 to rotate by an angle corresponding to the number of pulses. Further, the counter 58 is connected to the pulse instruction signal generator 5.
After receiving the signal from 8, it starts counting, and when the counted number reaches the number set by the count number setting circuit 57, a signal is output, and the electromagnetic actuator 87 is actuated via the driver 59, and the locking body 88 is activated. drum 25
Lock the upper weft thread 7. The counter 58 is reset by its own output and does not operate until the next signal from the pulse instruction signal generator 5B is input. Pulse instruction signal generator 58 is also reset by its own output.

(Operation) Next, the operation of the apparatus of the present invention configured as described above will be explained. When the loom is started, the rotating shaft 18 rotates a preset number of times per revolution of the loom, for example, 8 times, but in this case, the drum 25 remains stationary due to the action of the weight 27, so the yarn feeder (Fig. (not shown) to nozzle 1? The weft yarn 7 fed into the yarn guide hole 18 of the rotating shaft 18 and the yarn guide tube 19 through the thread guide hole 22 of the yarn guide 21 is wound around the stationary drum 25 .

In this case, when the amount of wrapping around the drum z5 reaches a predetermined amount, the sensor detects this and stops the rotation of the rotating shaft 1B,
When the amount falls below a predetermined amount, the rotating shaft 18 is rotated and the weft 7 is removed again.
is wound around the drum 25. Also, while the weft yarn 7 is being wound around the drum 25, the locking body B8
enters into the annular groove 86 and locks the weft yarn 7.

However, in the present invention, since the weft locking body 88 is rotated by a predetermined angle nα (for example, α=lO°, n=constant) around the stationary drum 25 for each cycle of the loom, weft insertion is possible. If the length is 10 α corresponding to 8 rotations of the drum, the locking body 88 is rotated by +α for each weft insertion, that is, the locking body 88 is rotated by 10° by the step motor 85.

When the main shaft of the loom is at a predetermined angle, that is, when it is time to start weft insertion, the crank angle sensor 51 detects this and excites the electromagnetic actuator 87 to pull in the locking body 88. The weft 7 wound around the drum 25 is inserted by injecting air from the nozzle 4 in advance. As the weft yarn 7 is wound back around the drum 25 by this weft insertion, the yarn sensor 89 detects the number of times the weft yarn 7 passes in front of the drum 25, and the counter 58 counts the number of times. When the count reaches a set value (for example, 8 times), the count setting circuit 57 detects this and sends a signal to demagnetize the electromagnetic actuator 87. Therefore, a spring built into the electromagnetic actuator 87 causes the locking body 88 to move into the annular groove 88 of the drum 25.
It rushes in and locks the weft yarn 7 that has come around again.

Therefore, weft insertion is completed by locking the weft thread 7, but as described above, in the present invention, the weft thread locking body 88 is rotated by a predetermined angle nα around the stationary drum 25 for each cycle of the loom. Therefore, for each weft insertion described above, the locking body 88 is rotated by nα together with the cover 82 by the step motor 85, so the insertion length of the weft yarn 7 is determined by the count setting circuit 57 of the control circuit. The number of times set in x the circumferential length of the drum 25, 10, the number of times set in the pulse number setting circuit 54 (n) x α (setting unit angle).

(Effects) Since the device of the present invention is as described above, by setting the desired number positions in the count number setting circuit 57 and the pulse number setting circuit 54 of the control circuit, the weft yarn 7 can be adjusted without changing the drum z5. The weft insertion length can be set to any length. Therefore, according to the apparatus RVC of the present invention, there is no need to change the length measuring drum even when changing the area, and the excellent effect that the weft insertion length can be adjusted very easily can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a part of the weft length measuring device equipped with the length measurement amount adjusting device of the present invention, Fig. 2 is a partial front view thereof, and Fig. 8 is an example of the control circuit of the device of the present invention. FIG. 1... Frame 2... Nozzle holder 4... Weft insertion nozzle 5... Stay 6... Weft guide 7
... Weft thread 8 ... Bracket 10 ... Bearing 1B ... Rotating shaft 14 ... Toothed pulley 17 ... Air injection nozzle for weft thread drawing 18 ... Thread guide hole 19.
... Yarn guide tube 21 ... Yarn guide 2z ... Guide hole 28 ... Drum support z5 ... Stationary drum z7 ... Weight 2
8...Disc-shaped thread guide 80...Ring-shaped support 81...Guide roller 82...Cylindrical cover
88, 84...Gear 85...Step motor 8
6... Annular groove B7... Electromagnetic actuator 88... Weft locking body 89... Yarn sensor 50...
Amplifier 51...Crank angle sensor 5z...Detection period instruction circuit 58...Pulse instruction signal generator 54...Pulse number setting circuit 55...Nox generation circuit 56...Driver 57... -Count number setting circuit 58...Counter 59...Doshiinoku-. Special Applicant Nissan Motor Co., Ltd.

Claims (1)

[Claims] L A sub-length circuit is provided which stores the weft yarn 7 by winding it around the stationary drum 25, counts the number of unwindings of the weft yarn 70, and transmits an actuation signal based on the counted number, and a weft yarn locking device which operates in response to the actuation signal. In the weft length measuring device equipped with a body 88, the weft locking body 88 is provided so as to be rotatable around the stationary drum 25, and the weft locking body 88 is set at a predetermined position around the stationary drum 25 for each cycle of the loom. A length measurement amount adjusting device for a weft length measuring device, characterized in that the device is configured to rotate in an angle.