JPH08113849A - Weft-treating apparatus in loom - Google Patents

Abstract

PURPOSE: To provide a weft treating apparatus excellent in cost and durability. CONSTITUTION: A brake wire 10 is fixed on the top of the output shaft 9-1 of a rotary solenoid 9 and rotating range of the brake wire 10 is controlled by position-controllers 11 and 12. The rotary solenoid 9 is composed of a tubular case 13, a pair of fixed iron cores 14 and 15 integrally protrusively formed in the inner circumferential surface of the case 13, an output shaft 9-1 and a cylindrical movable magnet 20 fixed on the output shaft 9-1. When the rotary solenoid 9 is kept in non-conducting state, the movable magnet 20 is forced from chain line position side of the brake wire 10 to full line position side of the brake wire. When the rotary solenoid 9 is kept in contacting state, the movable magnet 20 is forced from the full line position side of the brake wire to the chain line position side of the wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft handling device for a loom.

[0002]

2. Description of the Related Art At the end of flight of a weft in a jet loom, the weft is prevented from being pulled out from the weft length measuring and storage device. The weft is prevented from being pulled out by engagement between a winding surface and a weft locking pin. Since such a weft pull-out preventing function suddenly stops the flight of the high-speed flying weft to increase the tension, the weft may be cut. Therefore, a weft braking device is used in which the weft is braked when the weft insertion is almost finished to suppress a sudden tension increase.

Further, as disclosed in Japanese Utility Model Laid-Open No. 63-7183, there is disclosed a device for pulling back wefts in a jet loom in which a plurality of wefts are inserted. The plurality of weft-inserting main nozzles for inserting the wefts are adjacent to each other, and when the weft leading ends extend from the cylinder tips of the respective weft-inserting main nozzles, the weft leading ends are intertwined with each other. The weft pull-back device pulls back the weft that is on standby for weft insertion to prevent entanglement between the front ends of the weft. A pullback lever for pulling back the weft is rotated by a rotary solenoid.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Shokai 63-7183
The rotary solenoid disclosed in the publication can be applied to the case of driving a braking body for braking the weft. In this rotary solenoid, a return spring is used to return the pullback lever or the braking body to the standby position. The brake body of the weft yarn braking device or the pullback lever of the weft yarn pullback device described above is operated frequently and at high speed, but such repetition causes early deterioration of the return spring. In addition, an extra torque for canceling the spring force of the return spring is required as the torque due to the excitation of the rotary solenoid, and the torque of the rotary solenoid must be strengthened for this increased torque. Increasing the torque of the rotary solenoid increases the cost.

An object of the present invention is to provide a weft handling device which is excellent in cost and durability.

[0006]

To this end, in the invention of claim 1, a weft-handling body is provided with a weft-contacting body that contacts the weft and a rotary solenoid that switches the weft-contacting body between a standby position and a contact action position. The device is configured to energize the weft contact body from one position to the other when the rotary solenoid is energized between the standby position and the contact action position of the weft contact body, and de-energize the rotary solenoid. Then, the rotary solenoid has a torque characteristic for urging the weft contact body from the other position to the one position.

According to the second aspect of the present invention, there are provided a permanent magnet type rotary movable magnet having a pair of magnetic poles arranged in the circumferential direction, and a pair of electromagnet type fixed iron cores facing each other so as to surround the rotary movable magnet. In the rotary solenoid, the weft contact body is coupled to the movable magnet, and when the rotary solenoid is energized, the fixed iron core moves the movable magnet from the rotation position side corresponding to the standby position to the rotation position corresponding to the contact action position. When the rotary solenoid is not energized, the movable magnet is self-energized from the rotational position side corresponding to the contact acting position to the rotational position side corresponding to the standby position.

According to a third aspect of the present invention, a weft braking body for braking the weft between the weft measuring and storing device and the main weft insertion nozzle, and the weft braking body are switched between a standby position and a braking action position. The weft braking device is provided with a rotary solenoid to be arranged, and the weft braking device is attached from one position to the other position between the standby position and the braking action position of the weft braking member when the rotary solenoid is energized. The rotary solenoid is provided with a torque characteristic that urges the weft braking body from the other position to the one position in a non-energized state.

[0009]

When the rotary solenoid is energized, the rotary solenoid switches the weft contact body from one of the standby position and the contact acting position to the other position. In the energized state, the rotary solenoid urges the weft thread contact body from the one position to the other position, and the weft thread contact body is held in the other position by the torque generated by energization.
When the energization of the rotary solenoid is stopped, the rotary solenoid switches the weft contact body from the other position to the one position. In the non-energized state, the rotary solenoid urges the weft contact body from the other position to the one position, and the weft contact body is held in the one position by the torque due to the non-energization.

In the invention of claim 3, wherein the weft braking device is a weft handling device, the weft braking body is a weft contact body, and the braking action position is the contact action position. When the weft braking body is arranged at the braking action position, the weft thread comes into contact with the weft braking body and the weft thread is braked.

According to the second aspect of the invention, in the energized state, the movable magnet of the rotary solenoid obtains the torque for urging the movable magnet from the standby position side to the contact action position side from the fixed iron core. When the power supply to the rotary solenoid is stopped, the movable magnet of the rotary solenoid has a return torque that urges from the standby position side to the contact operation position side by the magnetic force of the movable magnet itself that acts on the fixed iron core. The return torque causes the weft yarn contact body to return to the standby position and is held at the standby position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in a weft braking device will be described below with reference to FIGS.

1 is a winding type weft measuring and storing device,
The weft yarn Y is wound and stored on the yarn winding surface 1-2 by the rotation of the yarn winding tube 1-1. The weft yarn Y wound and stored on the yarn winding surface 1-2 is released from the locking action of the weft locking pin 2-1 driven by the electromagnetic solenoid 2 by the jet action of the weft-insertion main nozzle 3. Be withdrawn. Straight line E in FIG.
Represents the amount of weft Y to be pulled out, and the machine base rotation angle θ ₀ represents the weft insertion start timing. When the weft thread locking pin 2-1 engages with the thread winding surface 1-2, the weft thread is prevented from being pulled out. The machine rotation angle θω in FIG. 4 represents the pull-out prevention timing. In this embodiment, the weaving width is 3 windings (length L).

A reflection type photoelectric sensor type weft unwinding detector 4 is installed near the bobbin winding surface 1-2. The weft unwinding detector 4 detects the unwound yarn pulled out from the bobbin winding surface 1-2, and this detection signal is sent to the control circuit 5.

As shown in FIG. 1, three yarn guide rings 6, 7 and 8 are arranged in series in front of the weft measuring and storing device 1. A rotary solenoid 9 is arranged below the weft path between the yarn guide ring 6 and the weft measuring and storing device 1. A braking wire 10 is fixed to the tip of the output shaft 9-1 of the rotary solenoid 9. The tip portion of the braking wire 10 is curved and inverted, and the yarn guide ring 7 is included in the rotation region of the curved portion around the output shaft 9-1.

As shown in FIG. 2, position regulating bodies 11 and 12 are arranged on the left and right of the braking wire 10. The position regulating pieces 11 and 12 regulate the rotation range of the braking wire 10. As shown in FIG. 1, the rotary solenoid 9 includes a cylindrical case 13, a pair of fixed iron cores 14 and 15 integrally formed on the inner peripheral surface of the case 13, and fixed to both ends of the case 13. Bearing covers 16 and 17, an output shaft 9-1 rotatably supported between the bearing covers 16 and 17 via radial bearings 18 and 19, and a cylindrical shape fixed to the output shaft 9-1. And the movable magnet 20. A pair of magnetic poles N and S are set on the peripheral surface of the movable magnet 20. As shown in FIG. 2, the pair of fixed iron cores 14 and 15 face each other so as to surround the movable magnet 20, and the electric wires 21 are wound around the bases of the fixed iron cores 14 and 15. When the switch 22 is turned on, a current is supplied from the power source 23 to the electric wire 21. With this power supply, the fixed wires 14 and 15 are excited.

The arrow curve α in FIG. 2 represents the magnetic flux of the movable magnet 20, and the arrow curve β represents the magnetic flux due to the current passed through the electric wire 21. A curve D in FIG. 3 represents the torque of the output shaft 9-1 when a current is passed through the electric wire 21. Curves E ₁ and E
₂ represents the torque of the output shaft 9-1 when the electric current is not applied to the electric wire 21. The horizontal axis ψ represents the rotational position of the movable magnet 20. ψ
= 0 represents the rotational position of the movable magnet 20 when the braking wire 10 is at the chain line position indicated by ψ ₀ in FIG. ψ = ψ ⁻ represents the rotational position of the movable magnet 20 when the braking wire 10 is in the solid line position shown by ψ ⁻ in FIG. The position of the braking wire 10 indicated by ψ ⁻ is the standby position. ψ = ψ ⁺ is the braking wire 1
2 shows the rotational position of the movable magnet 20 when it is assumed that 0 is at the chain line position shown by ψ ⁺ in FIG. Position regulating body 11, 12
Indicates the rotation range of the movable magnet 20 by ψ = ψ ⁻ and ψ = ψ ₀ ⁻ (<
ψ ₀ ) and regulate. brake wire 10 shown in ^- [psi ₀
The position of is the braking action position.

When the rotary solenoid 9 is in the non-energized state, the movable magnet 20 corresponds to the braking action position of the braking wire 10 by the torque characteristic shown by the curve E _1.
From the rotational position ψ ₀ ⁻ side to the rotational position ψ ⁻ side corresponding to the standby position of the braking wire 10. Therefore, in the non-energized state, the movable magnet 20 is held at the rotational position ψ ⁻ corresponding to the standby position of the braking wire 10.

When the rotary solenoid 9 is energized
The movable magnet 20 is braked by the torque characteristic shown by the curve D.
Rotational position of the movable magnet 20 corresponding to the standby position of the wire 10.
Ψ ^-Corresponding to the braking action position of the braking wire 10 from the side
Rotational position ψ₀ ^-Is urged to the side. Therefore, in the energized state
The movable magnet 20 rotates at a position corresponding to the standby position of the braking wire 10.
Transposition ψ₀ ^-Held in.

Excitation / demagnetization of the rotary solenoid 9 is performed by a command from the control circuit 5. When the winding yarn on the yarn winding surface 1-2 is released from the locking action of the weft yarn locking pin 2-1 and is pulled out and unwound, this unwinding action is detected by the weft yarn unwinding detector 4
Is detected by When the weft unwinding detector 4 detects the weft three times, the control circuit 5 excites the rotary solenoid 9 a predetermined time t ₁ after the weft is detected three times as shown by the waveform C in FIG. Degauss after time t ₂ . The braking wire 1 is excited by the excitation of the rotary solenoid 9.
0 is rotationally arranged from the standby position shown by the solid line in FIG. 2 to the braking action position shown by the chain line, and the weft Y passing through the yarn guide rings 6, 7 and 8 is bent by the rotational arrangement of the braking wire 10. By this bent shape, the weft Y is braked, and the flying speed of the weft Y is reduced.

The weft withdrawal amount when the weft unwinding detector 4 detects the weft yarn three times is two windings (2L / 3), and when the weft withdrawal amount is three windings (L), that is, When the weft-locking pin 2-1 prevents the weft Y from being pulled out, the weft Y is braked by the braking wire 10. Therefore, the weft Y
Will never disconnect.

In this way, the braking wire 10 for braking the weft Y returns from the braking position to the standby position by utilizing the torque characteristic of the rotary solenoid 9 in the non-energized state. Therefore, a return spring for holding and returning the braking wire 10 to the standby position is unnecessary, and the problem of early deterioration of the return spring due to repeated high-speed and frequent braking operations does not occur. As a result, the durability of the weft braking device of this embodiment is improved.

Further, it is not necessary to increase the torque of the rotary solenoid 9 for canceling the spring force of the return spring, and the cost for increasing the torque can be reduced. In addition,
A configuration is also possible in which the braking wire 10 is in the standby position in the energized state, and the braking wire 10 is in the braking action position in the de-energized state.

Next, the embodiment of FIG. 5 in which the present invention is embodied in a weft retracting device will be described. In this embodiment, the wefts Y ₁ and Y ₂ measured by the pair of weft measuring and storing devices 24 and 25 are used.
Is injected from the pair of main weft insertion nozzles 26, 27. The weft Y ₁ is passed through the yarn guides 28, 29, 30 and the weft Y ₂ is passed through the yarn guides 31, 32, 33.
The pullback wire 34 is arranged so that the weft path between the yarn guides 28 and 30 can be swept, and the pullback wire 35 is arranged so that the weft path between the yarn guides 31 and 33 can be swept. The pullback wires 34 and 35 are connected to the output shafts 40-1 and 41-1 of the rotary solenoids 40 and 41 having the same torque characteristics as those of the first embodiment. Pull-back wire 34
The rotation range of is regulated by the position regulating bodies 36 and 37,
The rotation range of the pullback wire 35 is determined by the position regulating members 38, 39.
Regulated by.

The pullback wires 34 and 35 are on standby at the solid line positions. When the rotary solenoids 40 and 41 are excited, the pullback wires 34 and 35 are arranged at the pullback action position indicated by the chain line. When the rotary solenoids 40 and 41 are demagnetized, the pullback wires 34 and 35 return to the standby position. Although the weft pull-back is performed at high speed and frequently, the rotary solenoids 40 and 41 are used as in the case of the first embodiment.
The durability of the weft pulling-back device using is improved.

It is also possible to adopt a construction in which the pullback wire 35 is in the standby position in the energized state, and the pullback wire 35 is in the pullback working position in the de-energized state.
Next, FIG. 6 shows an embodiment in which the present invention is embodied in a weft cutting device.
It will be described based on. In this embodiment, the weft yarn repulsed on the cloth cloth W ₁ of the woven fabric W by the modified reed 52 is the cutter 53.
Is cut and separated from the main weft inserting nozzle (not shown). The cutter 53 includes a fixed blade 53-1 and a movable blade 53-2.
The movable blade 53-2 is connected to the output shaft 54-1 of the rotary solenoid 54 similar to that of the first embodiment. The rotation range of the movable blade 53-2 is regulated by the pair of position regulating bodies 55 and 56.

The movable blade 53-2 stands by at the solid line position.
When the rotary solenoid 54 is excited, the movable blade 53-2 is arranged at the cutting action position shown by the chain line. When the rotary solenoid 54 is demagnetized, the movable blade 53-2 returns to the standby position. Although weft cutting is performed at high speed and frequently, durability of the weft cutting device using the rotary solenoid 54 is improved as in the case of the first embodiment.

The movable blade 53-2 may be in the standby position in the energized state, and the movable blade 53-2 may be in the cutting action position in the de-energized state. Next, an embodiment in which the present invention is embodied as a weft selection device in a rapier loom will be described with reference to FIG. In this embodiment, four types of weft Y
Any one of ₁ , Y ₂ , Y ₃ , and Y ₄ is selected and arranged on the moving path of the rapier head (not shown) by the weft selection levers 42, 43, 44, and 45 in accordance with the weft insertion timing. The weft selection levers 42, 43, 44 and 45 have output shafts 48-1, 49-1 and 50 of rotary solenoids 48, 49, 50 and 51 having the same torque characteristics as in the first embodiment.
-1, 51-1 are connected. Weft selection levers 42, 4
The rotation range of 3,44,45 is a pair of position regulating bodies 46,4.
Regulated by 7.

The weft selection levers 42 to 45 are on standby at the solid line position. When the rotary solenoids 48 to 51 are excited, the weft yarn selecting levers 42 to 45 are arranged at the weft yarn selecting working position shown by the chain line. When the rotary solenoids 48 to 51 are demagnetized, the weft yarn selection levers 42 to 45 return to the standby position. Although weft selection is performed at high speed and frequently, the durability of the weft selection device using the rotary solenoids 48 to 51 is improved as in the case of the first embodiment.

In the energized state, the weft selection levers 42-
A configuration is also possible in which 45 is in the standby position and the weft selection levers 42 to 45 are in the weft selection operating position in the non-energized state.

Next, an embodiment in which the present invention is embodied in a winding type weft measuring and storing device will be described with reference to FIG. In this embodiment, the weft-locking lever 57 is arranged to be switched between a weft-locking position in which the weft-winding surface 1-2 of the weft-measurement storage device 1 is engaged and a standby position in which the weft-locking surface is separated from the weft-winding surface 1-2. The weft lock lever 57 is a rotary solenoid 5 similar to that of the first embodiment.
8 output shafts 58-1. Weft lock lever 5
The rotation range of 7 is restricted by the position restricting body 59 and the bobbin winding surface 1-2.

The weft thread locking lever 57 stands by at the chain line position. When the rotary solenoid 58 is excited, the weft thread locking lever 57 is arranged at the weft thread locking position shown by the solid line. When the rotary solenoid 58 is demagnetized, the weft lock lever 5
7 returns to the standby position, and the weft Y is released from the locking action of the weft stop lever 57. Although weft locking and releasing are performed at high speed and frequently, the durability of the weft measuring and storing device 1 using the rotary solenoid 58 is improved as in the case of the first embodiment.

It is also possible to adopt a construction in which the weft-locking lever 57 is in the standby position in the energized state, and the weft-locking lever 57 is in the weft-locking position in the de-energized state. Inventions other than those described in the claims that can be understood from the above-described embodiments will be described below along with their effects. (1) In a jet loom in which a plurality of types of wefts are injected by the jetting action of a plurality of weft-inserting main nozzles, a weft-retracting body for retracting the weft between the weft measuring and storing device and the weft-inserting main nozzle And a rotary solenoid that switches the weft pull-back body between a standby position and a pull-back action position, and between the standby position and the pull-back action position of the weft pull-back body, when the rotary solenoid is energized, In the jet loom, the rotary solenoid is provided with a torque characteristic that urges the weft retracting body from one position to the other position when the rotary solenoid is not energized. .

The durability of the weft retracting device is improved. (2) In a jet loom equipped with a weft cutting device that cuts the beating beating yarn in cooperation with a fixed blade and a movable blade, the movable blade is connected to a rotary solenoid, and the movable blade is set to a standby position by the rotary solenoid. It is switched to the cutting action position and between the standby position and the cutting action position of the movable blade, the movable blade is urged from one position to the other position between the standby position and the cutting action position of the movable blade when the rotary solenoid is energized. A weft cutting device in a loom, in which a rotary solenoid has a torque characteristic for urging the movable blade from the other position to the one position in the energized state.

The durability of the weft cutting device is improved. (3) In the jet loom where the weft measuring and storing device of the winding type measures and stores the weft, and injects the weft by the jetting action of the main nozzle for weft insertion, the yarn winding surface of the weft measuring and storing device. A weft thread locking body that unwinds and prevents unwinding of the upper weft thread is connected to a rotary solenoid, and the rotary solenoid switches the weft thread locking body between a standby position and a locking action position to wait for the weft thread locking body. Between the position and the locking action position, the weft thread locking body is urged from one position to the other position when the rotary solenoid is energized, and the weft thread locking body is biased to the other side when the rotary solenoid is not powered. A weft retracting device in a jet loom, in which a rotary solenoid has a torque characteristic for urging from one position to one position.

The durability of the weft measuring and storing device is improved.

[0037]

As described in detail above, in the invention of claim 1, when the rotary solenoid is energized, the weft contact body is urged from one position of the standby position and the contact action position to the other position, and the rotary solenoid is urged. Since a rotary solenoid having a torque characteristic for urging the weft contact body from the other position to the one position in the non-energized state is used, a weft handling device excellent in cost and durability can be configured.

According to the second aspect of the invention, there is provided a rotary solenoid comprising a rotary movable magnet having a pair of magnetic poles arranged in the circumferential direction, and a pair of electromagnet type fixed iron cores facing each other so as to surround the rotary movable magnet. Since it is used, a weft handling device excellent in cost and durability can be constructed.

According to the third aspect of the invention, when the rotary solenoid is energized, the weft braking body is urged from one position of the standby position and the braking action position to the other position, and in the non-energized state the weft braking body is moved to the other side. Since a rotary solenoid with a torque characteristic that urges from one position to one position is used,
A weft braking device excellent in cost and durability can be configured.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment in which the present invention is embodied in a weft braking device.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a graph showing torque characteristics of a rotary solenoid.

FIG. 4 is a graph showing the amount of weft pulled out and the braking timing.

FIG. 5 is a perspective view showing an embodiment in which the present invention is embodied in a weft retracting device.

FIG. 6 is a side view showing an embodiment in which the present invention is embodied in a weft cutting device.

FIG. 7 is a perspective view showing an embodiment in which the present invention is embodied in a weft selection device.

FIG. 8 is a perspective view showing an embodiment in which the present invention is embodied in a weft measuring and storing device.

[Explanation of Codes] 9, 40, 41, 48, 49, 50, 51, 54, 58
... rotary solenoid, 10 ... braking wire serving as weft braking body, 14, 15 ... fixed iron core, 20 ... movable magnet, Y ... weft.

Claims (3)

[Claims] 1. A weft contact body that comes into contact with a weft thread, and a rotary solenoid that switches the weft contact body between a standby position and a contact action position, and between the standby position and the contact action position of the weft contact body, When the rotary solenoid is energized, the weft contact body is urged from one position to the other position, and when the rotary solenoid is not energized, the weft contact body is urged from the other position to one position. A weft handling device for a loom with a solenoid. 2. A rotary solenoid comprising a rotary movable magnet having a pair of magnetic poles arranged in the circumferential direction, and a pair of electromagnet-type fixed iron cores facing each other so as to surround the rotary movable magnet. When the weft contact body is connected to the magnet and the rotary solenoid is energized, the fixed iron core urges the movable magnet from the rotation position side corresponding to the standby position to the rotation position side corresponding to the contact action position, and then to the rotary solenoid. 2. The weft handling device for a loom according to claim 1, wherein, in the non-energized state, the movable magnet self-energizes from the rotational position side corresponding to the contact acting position to the rotational position side corresponding to the standby position. 3. A weft braking body for braking the weft between the weft measuring and storing device and the main nozzle for weft insertion in a jet loom for injecting weft by the jetting action of the main weft insertion nozzle. , A rotary solenoid for switching the weft thread braking body between a standby position and a braking action position, and between the standby position and the braking action position of the weft thread braking body, one of the weft thread braking bodies is operated when the rotary solenoid is energized. A weft braking device in a jet loom in which the rotary solenoid has a torque characteristic that urges the weft braking body from one position to the other position when the rotary solenoid is not energized.