JPH0344989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn storage and payout device, and more particularly to a yarn storage and payout device used to supply yarn while maintaining a constant tension.

As is well known, in a loom, a yarn storage/feeding device is used to feed the weft while maintaining a constant tension. This type of yarn accumulation/
The feeding device is used not only for supplying weft yarns to looms, but also for winders and the like.

By the way, conventionally known thread storage/feeding devices include a so-called Savi type with a rotating bobbin drum, and a so-called Sulzer type with a stationary bobbin drum. A rust-type yarn storage/feeding device keeps the yarn winding member stationary and rotates the yarn winding drum, thereby winding and storing a predetermined amount of yarn around the outer periphery of the yarn winding drum. When the loom is in operation, the thread is unwound from the bobbin drum while maintaining a constant tension and supplied to the loom. At the same time, the bobbin drum rotates to replenish the unwound yarn. That is, the thread on the bobbin drum is simultaneously wound and replenished while being drawn out. On the other hand, in a sluzer-type yarn storage/payout device, the thread winding drum is kept stationary and the thread winding section is rotated to wind a predetermined amount of thread around the thread winding drum. At the same time as the yarn begins to unwind, the thread winding member starts to replenish the insufficient amount of yarn.

Next, we will discuss the characteristics and advantages and disadvantages of both.
The rust type yarn storage/unwinding device keeps the bobbin winding drum in constant rotation, so even in the case of intermittent yarn unwinding, the yarn is constantly swung around, making it difficult to form snarls, making it suitable for highly twisted yarn. However, the yarn speed
When the speed exceeds 800 m/min, the tension ring is fitted onto the rotating bobbin drum, so centrifugal force spreads the fingers of the tension ring, reducing the tension and eventually turning into no tension. This includes the problem of moving. For this reason, the yarn speed that can be practically used with rust type yarns is limited to 900 m/min at most, and cannot be used above that speed.

On the other hand, in a sluzer type yarn storage/unwinding device, the bobbin drum is stationary, so when the yarn is being unwinded intermittently, the yarn hangs down and comes to rest, making it easy for snarls to form, resulting in highly twisted yarn. is not suitable. However, even when the yarn speed is 800 m/min or more,
Since the tension ring is stationary, there is no tension fluctuation. Furthermore, when the yarn speed is 1200 m/min or more, the yarn winding speed becomes too high and the yarn is likely to break, which is dangerous. Therefore, the rust type is suitable for low yarn speeds of 800 m/min or less, while the throughza type is suitable for high yarn speeds of 800 m/min or more. However, in any case, there was a drawback that it could not be applied to high-speed unwinding at yarn speeds of 1200 m/min or higher.

Therefore, an object of the present invention is to be able to eliminate the drawbacks of both the rotating bobbin drum type and the stationary bobbin drum type, to exhibit the characteristics of both, and to increase the yarn speed.
It is an object of the present invention to provide a yarn storage/payout device that enables high-speed payout with a constant tension even at high speeds of 1200 m/min or higher.

In summary, the present invention includes a structure in which a bobbin winding member is rotatably provided, a bobbin drum is rotatably supported, and the bobbin drum is rotationally driven in a direction opposite to the rotational direction of the bobbin winding member. If the rotational speeds of the bobbin winding member and the bobbin winding drum are each set to the stable maximum speed, the speed at which the thread is wound around the outer periphery of the bobbin drum will be the sum of both, so 800 m/min + 1200 m/min = 2000 m/min is also possible, making the bobbin winding speed This makes it possible to significantly speed up the process.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a cross-sectional structure of a yarn storage/feeding device according to an embodiment of the present invention. In the configuration,
The yarn storage/payout device 10 of this embodiment includes a housing 11 . The housing 11 has a cylindrical or bowl-shaped first fixing part 111 and a second fixing part 112.
It is constructed by fitting the two in the axial direction. A bearing 13 fixed to the first and second fixed parts 111, 112 is located near the center of the first and second fixed parts 111, 112.
The main shaft 12 is pivotally supported by a, 13b, 13c, and 13d. The main shaft 12 is formed so that the center of a portion thereof in the longitudinal direction is hollow. First fixing part 11
On the other side of 1 is a yoke (case) 1 of the motor 14.
41 is fixed. The motor 14 is a DC motor, which is called a print motor or a flat motor. This motor 14 has an armature 142 formed of a disc-shaped copper plate fixed to the main shaft 12, and field poles (for example, permanent magnets) 143 at every fixed angle (for example, 90 degrees) of a yoke 141 facing the armature 142. It is configured by attaching. Further, a brush 144 is brought into contact with the armature 142 from the side thereof. Of course, the motor 14 may be provided externally and the main shaft may be rotated using a pulley, gears, or the like.

A part of the thread wrapping member 15 is inserted into the hollow part of the main shaft 12, and one end of the thread wrapping member 15 is attached to the main shaft 12.
exposed up to one end. The thread winding member 15 is formed into a pipe shape, and is connected to the main shaft 12 midway on the other end side.
The other end portion 152 is bent at a certain distance from the center of the main shaft 12 so as to be parallel to the main shaft 12. A balancer 16 is formed on the bent main shaft 12 of the thread wrapping member 15 to maintain balance with the other end 152 of the thread wrapping member 15. That is, the balancer 16 is connected to the main shaft 12
The cylindrical portion 161 is fixed to a part of the thread wrapping member 1.
5, and a balance pin 162 formed in a cylindrical portion 161 that is symmetrical with respect to the bending direction of FIG. Further, bearings 13e, 13 are provided on the other end side of the main shaft 12.
f and 13g are provided at appropriate intervals in the axial direction.

The peg drum 17 has a drum shaft 173 fixed to the center of one side surface 172 of a drum-shaped peg 171, and a magnet drum 174 and a gear box 175 integrally fixed to the inside of the peg 171. The center of the magnetic drum 174 is
It is fitted into the outer peripheral portion of the bearing 13e. The center portion of the gearbox 175 is fitted into the bearing 13f.
An end cover 176 is fixed to the right side surface of the gearbox 175. Main shaft 1 of drum shaft 173
At the second end, a recess that fits with the outer circumference of the bearing 13g is formed at the center thereof, and a gear 177 that becomes part of the reverse transmission mechanism 18 is formed at the circumference thereof. Further, a tension ring 178 is provided on the outer periphery of the thread winding portion 171.

With this configuration, the main shaft 12 is rotatably supported by the housing 11 and rotationally driven by the rotational force of the motor 14. A thread winding drum 17 is rotatably supported on the other end side of the main shaft 12.

Furthermore, in relation to the other end of the main shaft 12 and the gear 177 of the bobbin drum 17, a reverse rotation transmission mechanism 1, which is an example of a bobbin drum reverse drive means that is a feature of this embodiment, is provided.
8 is provided. Reverse transmission mechanism 18 of this embodiment
is constructed as follows. That is, within the gearbox 175, a subshaft 181 parallel to the main shaft 12 is supported by bearings 182 and 183. Main shaft 1 in the area narrowed between bearing 13e and bearing 13f
A pulley 184 is fixed to 2. Subshaft 181
A pulley 185 is fixed to one side of the . A belt 186 is placed over pulleys 184 and 185. A gear 18 is provided on the outer periphery of the other side of the subshaft 181.
7 is fixed. Needle thrusts 188 are provided at both ends of this gear 187. gear 187
is the gear 17 provided in relation to the drum shaft 173
It meshes with 7.

Furthermore, a magnetic coupling section 19 is provided in association with the magnetic drum 174 and the second fixed section 112. The magnetic coupling section 19 is connected to the magnetic drum 174.
A plurality of permanent magnets 191 are fixed to a part of the permanent magnet 191, and a second
A plurality of permanent magnets 19 are fixed to the fixed part 112 of
It consists of 2. This magnetic coupling part 19 is caused by friction with the main shaft 12 or by the other end 152 of the thread-wrapped member 15 due to the magnetic attraction force of the permanent magnets 191 and 192.
It serves to prevent the magnet drum 174 and gearbox 175 from rotating due to the tension of the thread wound by the thread.

Corresponding to the outer circumferential portion of the thread winding portion 171, the sensor S1 and the sensor S2 are provided at a certain distance apart in the lateral direction. The sensor S1 is connected to the peg section 171.
This is a photoelectric sensor for optically detecting that the amount of thread wound around the thread, that is, the amount of stored thread has fallen below a predetermined amount. The sensor S2 is a photoelectric sensor for detecting that a predetermined amount or more of thread is wound around the thread winding section 171.

In operation, if there is little yarn wound and stored in the thread winding section 171, there is no output from the sensor S2. Therefore, based on the fact that there is no output from the sensor S2, current is supplied to the armature 142 of the motor 14, so that the armature 142 is rotationally driven.
At this time, the main shaft 12 and the thread winding section 15 are rotationally driven together with the armature 142. Therefore, the thread 1 supplied to one end 151 of the thread winding member 15 is
a is guided to the other end 152 through the interior of the thread winding member 15, and is wound around the outer periphery of the thread winding portion 171 as the thread winding member 15 rotates.

At the same time, the rotational force of the main shaft 12 is applied to the pulley 18.
4. Subshaft 1 via belt 186 and pulley 185
81. At this time, the rotational direction of the subshaft 181 is the same as the rotational direction of the main shaft 12.
When the subshaft 181 rotates in the same direction as the main shaft 12, the gear 187 fixed to the subshaft 181 also rotates, so the gear 177 meshed with the gear 187 rotates in the opposite direction to the rotation direction of the subshaft 181. Rotate. That is, the drum shaft 173 rotates in the opposite direction to the main shaft 12, and the thread winding portion 171 is rotated in the opposite direction to the rotation direction of the one end portion 152 of the thread winding member 15. As a result, the speed at which the yarn is wound by the rotation of the main shaft 12 is selected to be approximately 800 m/min, and the pulley 184
If the circumference ratio of and 185 and the gear ratio of gear 187 and gear 177 are selected to be approximately the same, the yarn speed becomes the sum of the rotational speed of the main shaft 12 and the reversal speed of the bobbin drum 17, and the yarn is supplied at an extremely high speed. There is an advantage that the thread can be wound around the outer periphery of the thread winding portion 171.

When the sensor S2 detects the thread 1b wound around the bobbin winding section 171, the armature 14 is
2 and stops the motor 14. At this time, even if the motor 14 stops, the bobbin drum 1
7 (magnetic drum 174, gearbox 17
5) attempts to rotate due to the inertia of high-speed rotation, but the magnetic force between the permanent magnets 192 and 191 weakens the inertia of the peg drum 17, causing the peg drum 17 to stop.

The yarn 1b wound around the thread winding section 171 is supplied to a loom or the like as a payout yarn 1c via a tension ring 178. When the yarn 1c is pulled by the loom after this unwinding, the yarn 1b wound and stored around the thread winding section 171 gradually decreases, and eventually the yarn in the portion facing the sensor S2 is let out. Then, the sensor S2 detects that the thread 1b is missing, and the armature 142 is energized. Therefore, the motor 14 is driven to rotate to rotate the main shaft 12, and the bobbin drum 17 is driven to rotate in the opposite direction to the main shaft 12, in the same manner as described above. This operation continues until there is an output from sensor S2.

Thereafter, when the sensor S2 detects the yarn 1b, the motor 14 is stopped and the sensor S2 detects the yarn 1b.
6 is no longer detected, the armature 142 is momentarily excited. In this way, a certain amount of yarn is intermittently wound around the bobbin section 171 at very short intervals,
An operation is performed to let out the yarn that has been wound and stored. On the other hand, when the sensor S1 detects that the thread 1b is running out, the rotational speed of the motor 14 is increased to prevent the thread from running out on the bobbin drum 17.

In the illustrated embodiment, pulleys 184 and 18 are used to transmit the rotational force of the main shaft 12 to the sub shaft 181.
5 and a belt 186, and in order to reverse the rotational force of the countershaft 181 and transmit it to the drum shaft 173, a gear 18 is provided on the countershaft 181 and the drum shaft 173, respectively.
7,177 is provided. However, instead of this, a gear mechanism may be used as a mechanism for transmitting the rotational force of the main shaft 12 to the subshaft 181, and a pulley and a belt may be used as a mechanism for transmitting the rotational force of the subshaft 181 to the drum shaft 173. Of course.

FIG. 2 is an illustrative view showing the cross-sectional structure of another embodiment of the yarn storage/feeding device of the present invention. The yarn storage/feeding device 20 of this embodiment differs from that shown in FIG. 1 in that the reverse transmission mechanism is configured as follows. That is, in the reverse rotation transmission mechanism 18 of this embodiment, the subshaft 181 is connected to the subshaft 181 and the gear 187.
A one-way clutch (or roller clutch) 21 is provided between the two. With this configuration, the rotational force of the main shaft 12 is transmitted to the drum shaft 173, but when the main shaft 12 stops before the peg drum 17, the rotational force due to the inertia of the peg drum 17 continues the main shaft 12. This has the advantage that the magnetic force of the magnetic coupling portion 19 can be overcome and the gearbox 175 can be prevented from rotating.

The rest of the configuration is the same as that in FIG. 1, so the same parts are indicated by the same reference numerals and detailed explanation thereof will be omitted.

FIG. 3 is an illustrative view showing the cross-sectional structure of still another embodiment of the yarn storage/feeding device of the present invention. The yarn storage/feeding device 30 of this embodiment differs from the one shown in FIG. 1 in that the reverse transmission mechanism is comprised only of gears. That is, the reverse transmission mechanism 31 included in the yarn storage/feeding device 30 of this embodiment
is constructed as follows. A gear 311 is fixed to one end of the main shaft 12. The gear 311 has
A gear 313 supported by a shaft 312 is meshed.
A gear 314 is meshed with the gear 313 . The gear 314 is supported by a shaft 315, and the width of its teeth is selected to be about twice as long as that of the gears 311 and 313.
The parts of the gear 314 that do not mesh with the gear 313 are
A gear 177' fixed to the drum shaft 173 is meshed. Further, in this embodiment, the gearbox is used as both the magnetic drum 174 and the end cover 176, and the drum shaft 173 is used as the end cover 17.
It is pivotally supported by bearings 13i and 13j fixed to 6'. The rest of the configuration is almost the same as in FIG. 1, so the same parts are designated by the same reference numerals and detailed explanation thereof will be omitted.

In operation, when the main shaft 12 rotates, the gear 3
A gear 313 meshed with the main shaft 11 rotates in the opposite direction to the main shaft 12. Further, the gear 314 is the gear 31
It rotates in the opposite direction to the rotation direction of No. 3, that is, in the same direction as the main shaft 12. By the rotation of gear 314,
Gear 177' rotates in a direction opposite to the direction of rotation of gear 314. As a result, the gear 177' is connected to the main shaft 12.
The rotational force of the main shaft 12 is reversed and transmitted to the bobbin drum 17.

FIG. 4 is a sectional view showing the details of still another embodiment of the yarn storage/feeding device of the present invention. The yarn storage/feeding device 40 of this embodiment differs from the one shown in FIG. 1 in that the reverse transmission mechanism 41 is constructed of a bevel gear. To explain more specifically, the reverse rotation transmission mechanism 41 of this embodiment includes bevel gears 411, 41
Contains 2,414. The bevel gear 411 is fixed to one end of the main shaft 12. The bevel gear 412 is pivotally supported by a shaft 415 supported in a direction perpendicular to the main shaft 12 via bearings 416 and 417. Main shaft 1
A bevel gear 414 is located on the extension line of one end of 2.
The drum shaft 173 integrally formed with the bearing 1
74. Shaft 415 is supported at the joint between magnet box 174 and gear box 175. Note that the other configurations are the same as in FIG. 1, so the same parts are designated by the same reference numerals and detailed explanation thereof will be omitted.

In operation, when the main shaft 12 rotates, the main shaft 1
The bevel gear 411 rotates integrally with 2. Bevel gear 4
The rotational force of 11 is converted by 90 degrees and transmitted to the bevel gear 412. The rotation of bevel gear 412 causes bevel gear 414 to rotate. At this time, the bevel gear 414
The rotational direction of the bevel gear 411 is opposite to the rotational direction of the main shaft 12. As a result, the rotational force of the main shaft 12 is reversed, and the drum shaft 1
73, and the peg drum 17 can be reversed.

In the embodiments shown in FIGS. 3 and 4, a one-way clutch may be used in the same manner as in FIG. 2.

Incidentally, in each of the above-mentioned embodiments, a case has been described in which the rotational force of the main shaft 12 is transmitted to the peg drum 17 using a mechanical reverse transmission mechanism.
It is also possible to electrically reverse the rotation by providing a small motor for rotating the spindle independently and in the opposite direction to the main shaft 12.

As described above, according to the present invention, since the thread winding member and the thread winding drum are reversed to wind and store the thread on the thread winding drum, the thread speed is significantly increased compared to the conventional rust type or sluther type. Moreover, even when the yarn speed is increased, there is no tension state or yarn breakage, and the yarn can be reliably fed out at high speed.

[Brief explanation of drawings]

FIG. 1 is an illustrative view showing the cross-sectional structure of a yarn storage/feeding device according to an embodiment of the present invention. FIGS. 2, 3, and 4 are illustrative views showing the cross-sectional structure of a yarn storage/feeding device according to another embodiment of the present invention. In the figure, 11 is a housing, 12 is a main shaft,
13a to 13f are bearings, 14 is a motor, 15 is a thread winding member, 16 is a balancer, 17 is a thread winding drum,
Reference numerals 18, 21, 31 and 41 represent a reversal transmission mechanism as an example of a means for driving the reversal of the bobbin drum, 19 represents a magnetic coupling portion, and S1 and S2 represent sensors.

Claims (1)

[Scope of Claims] 1. A yarn storage/feeding device for storing supplied yarn and feeding out the stored yarn, the main shaft having a hollow portion formed in a part thereof and rotatably supported. a motor for rotationally driving the main shaft; a peg drum whose rotating shaft is selected on an extension of the axis of the main shaft and is rotatably supported; a tension ring attached to the peg drum; A portion of the outer periphery of the bobbin drum is provided at one end of the spindle through the hollow part of the spindle, and the other end is bent at a certain angle with respect to the spindle midway on the other side of the spindle. a bobbin winding member that, as the motor rotates, winds the thread supplied from one end onto the bobbin drum; drive,
a peg drum reversal drive means for increasing the circumferential speed of the peg drum relative to the peg member, thereby increasing the winding speed of the thread on the peg drum; Therefore, the thread storage/storage method is characterized in that the thread given tension is fed out while being swung around by the rotation of the bobbin drum.
Feeding device. 2. The thread winding drum reversing drive means according to claim 1, wherein the thread winding drum reverse drive means includes a pulley and a belt for converting the rotational force of the main shaft in the opposite direction and transmitting the rotational force to the thread winding drum, and a gear. Storage/dispensing device. 3. The yarn storage/feeding device according to claim 1, wherein the thread winding drum reverse drive means includes a plurality of gear mechanisms that convert the rotational force of the main shaft in the opposite direction and transmit the rotational force to the thread winding drum. 4. The bobbin drum reverse drive means includes: a first bevel gear fixed to the other end of the main shaft; and a first bevel gear meshed with the first bevel gear and pivotally supported in a direction perpendicular to the main shaft. a third bevel gear that is meshed with the second bevel gear, is supported in the axial direction of the main shaft, rotates in the opposite direction to the main shaft, and transmits its rotational force to the bobbin drum; The yarn storage according to claim 1, comprising:
Feeding device. 5. The thread winding drum reversing drive means according to any one of claims 1 to 3, wherein the thread winding drum reversal drive means includes a one-way clutch for transmitting the rotational force of the main shaft to the thread winding drum in one direction. Storage/dispensing device. 6. The main shaft is rotatably supported within a housing, and the housing and the peg drum are associated with a magnetic coupling part for stopping the rotation of the peg drum due to inertia by magnetic force. The yarn storage/feeding device according to any one of items 1 to 5.