JPH08337317A - Bobbin supplying device - Google Patents

Abstract

PURPOSE: To provide a bobbin supplying device which can prevent a parts feeder from going in the condition incapable of supplying. CONSTITUTION: A bobbin supplying device concerned 1 has a conveyor device 3 which feeds bobbin B supplied in a large quantity to a feeder ball 23 bit by bit and consists of a plurality of conveyors 11, 12 laid in line in the bobbin supplying direction, wherein a sensor S4 to detect the bobbin supplying level on the conveyors is furnished, and adjusting means 39, 40 adjacent the transfer quantity of the bobbin from the upstream conveyor 11 onto the downstream conveyor 12 in compliance with the detecting result given by the sensor S4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn feeding device for a yarn feeding tray which circulates through a machine stand of an automatic winder.

[0002]

2. Description of the Related Art Conventionally, in the case of supplying a spinning yarn to each weight of an automatic winder, the yarns are bulk-stacked in a wagon and conveyed to a yarn feeding device, and the wagon is inverted and tilted by a unloading device. , The tube yarns in the wagon are gradually unloaded on the conveyor device, and the pile yarns unloaded by the conveyor device are broken by the conveyor device while vibrating.
It was being fed into the feeder ball of the da. And, by the above-mentioned part feeder and the separation conveyor following it,
The filaments in the feeder ball are separated one by one and fed to the umbilical ridge determining section to determine the celestial edge. The tubing of the discriminating section was dropped into the alignment shoe, and was inserted into the peg of the empty tray stopped below the alignment shoe and supplied.

In such a yarn supplying device, in order to prevent the separating and supplying ability of the vibrating part feeder from being saturated, the amount of the yarn from the conveyor device into the feeder ball is large. I needed to make sure I didn't become too much.

For this reason, the conveyor device is composed of two conveyors arranged horizontally and continuously, and a constant intermittent drive is performed at a constant speed ratio in which the rotation of the conveyor on the downstream side is made faster than that on the downstream side. Was there. Then, the piled yarns unloaded on the upstream conveyor are cut off when they are transferred to the downstream conveyor, and the yarns are fed into the feeder ball.

[0005]

However, in the conventional apparatus, since the speed ratio between the upstream conveyor and the downstream conveyor is constant, the upstream and downstream sides are adjusted according to the level of the piled yarn. It was not possible to adjust the amount by which the pile of tube yarns was broken down by the conveyor. When the level of the yarn is high, the yarn from the upstream conveyor is spilled into the downstream conveyor, and a large amount of the yarn is fed from the downstream conveyor into the feeder.
There is a problem that the situation may occur in which the feeder is not supplied because it is fed into the ball. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional drawbacks and to provide a yarn feeder which can prevent a situation where a part feeder cannot be fed.

[0006]

According to the invention of claim 1, there is provided a conveyor device for feeding a small amount of the supplied yarn into the feeder ball little by little. In a yarn thread feeder composed of a plurality of conveyors arranged in the feed direction, a sensor for detecting a yarn thread supply level on the conveyor is provided, and depending on the detection result of the sensor,
An adjusting means is provided to adjust the transfer amount of the yarn from the upstream conveyor to the downstream conveyor.

According to a second aspect of the present invention, a drive source is provided for each conveyor device, and the adjusting means adjusts the rotational speed of the upstream conveyor and the downstream conveyor according to the detection result of the sensor. Change the ratio.

According to the third aspect of the present invention, as an adjusting means, a weir that operates according to the detection result of the sensor is provided between at least one of the plurality of conveyors.

According to the fourth aspect of the present invention, a step is provided between at least one of the plurality of conveyors so that the downstream conveyor is lower than the upstream conveyor.

[0010]

According to the first aspect of the present invention, the means for adjusting the transfer amount of the yarn according to the detection result of the pile amount sensor of the yarn on the conveyor is the yarn from the upstream conveyor to the downstream conveyor. The transfer amount is adjusted at the time of transfer of No. 1, and a substantially constant amount of pipe yarn is supplied into the feeder ball even if the number of pipe yarns unloaded on the upstream conveyor is large or small.

According to the second aspect of the present invention, the plurality of conveyors are driven by the plurality of drive sources, and the rotational speed of the conveyor on the downstream side of the conveyor on the upstream side is changed according to the piled state of the yarns on each conveyor. By increasing the speed or stopping the upstream side or downstream side or both conveyors, the rotation speed of each conveyor is controlled by performing an intermittent drive independently.

According to the third aspect of the present invention, the weir does not ablate the yarn from the upstream conveyor to the downstream conveyor in accordance with the detection result of the pile amount sensor of the yarn on the conveyor. Adjust supply capacity.

According to the invention of claim 4, the conveyor on the downstream side is lower than the conveyor on the upstream side and is arranged so as to have a step, and the pile of the yarns on the conveyor on the upstream side is transferred to the conveyor on the downstream side. At this time, the pile yarn of the step yarn is broken by dropping the step dividing yarn.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.
explain. First, in the embodiment shown in FIG. 1, the structure of the yarn supplying device (1) of the present invention will be described. The yarn feeding device (1) comprises a unloading device (2), a conveyor device (3), a vibrating part feeder (4), a top end discriminating machine (5) and an alignment shoe (6). It is mainly composed. In Figure 1,
From the right side, the unloading device (2), the conveyor device (3), the vibrating part feeder (4), and the top end discriminating part (5) are arranged, and below the top end discriminating part (5). An alignment shoe (6) is provided.

The unloading device (2) inverts and tilts the wagon (9) that transports the yarn bundles (B) in bulk and unloads the conveyor device (3). In the conveyor device (3), the piled-up pile yarns are cut down little by little to adjust the feed amount of the pile yarns and to feed them to the vibrating part feeder (4). The vibrating part feeder (4) comprises a feeder ball (23) and a vibration driving part (24).
The yarn fed from the conveyor device (3) is fed into the feeder ball (23) of the vibrating part feeder (4). The feeder ball (23) is a vibration driving unit (2
The vibration is given by 4), and the vibrations sequentially send the yarns to the separating conveyor (25), and the separating conveyer (25) separates the yarns one by one, and the Amajiri judging section ( 5). The hem edge determination section (5) determines the hem edge of the supplied tubing and drops the tubing on the alignment shoe (6). A shoe guide (26) is provided at the lower end of the alignment shoe (6) so as to be openable and closable. Below the alignment shoes (6), there is a supply station (7) provided in a part of the tray transport path (8), and an empty tray (2
7) stops. The yarn is dropped from the aligning shoe (6) via the shoe guide (26) to the stopped empty tray (27) and is inserted.

The unloading device (2) is provided with a movable frame (10) for accommodating and holding a wagon (9) which has entered from the right in FIG. The movable frame (10) is rotatable from both sides via a shaft (34) to a pair of parallel endless chains (28) (the front side of which is omitted in the drawing) which are synchronously rotated at their backs. Supported by the endless chain
(28) is stretched between a pair of sprockets (29, 30) arranged above and below the unloading device (2), and is driven by power not shown. Further, the movable frame (1
0) is provided with a guide roller (31) that engages with the pair of guide grooves (32). In addition, the above endless chain
There is a limit switch (35, 3
6 and 37) are provided with dogs (33). Limit switches (35, 36, 37) are the endless chains.
A plurality of stages (three stages in the illustrated example) are provided at predetermined intervals along the track of the carriage (28).

The conveyor device (3) is provided with a plurality of conveyors (11, 12). The conveyor (11) is horizontally provided from the unloading device (2) toward the part feeder (4), and the end of the conveyor (11) on the part feeder (4) side ( The conveyor (12) is continuously and horizontally installed from 11a) to approximately above the center of the feeder ball (23). Upstream conveyor (1
A trough-shaped side wall (38) is provided around 1).

The conveyor (11) is stretched around shafts (13, 14) rotatably mounted on a frame (not shown). A pulley (15) is attached to the end of the shaft (14). Below the conveyor (11), a motor (M1) is arranged in a frame (not shown), and a pulley (16) is attached to the motor (M1). A belt (17) is stretched around the pulleys (15, 16). The motor (M1) is driven by the pulley (1
6) is rotated and the pulley (1) is passed through the belt (17).
5) and the shaft (14) are rotated and transmitted to the conveyor (11). The conveyor (11) feeds the yarn on the feeder board.
It rotates in the direction of feeding into the inside (23). Similarly, the downstream conveyor (12) is also stretched around shafts (18, 19) rotatably attached to a frame (not shown), and the shaft (1
A pulley (20) is attached to the end of 9). Below the conveyor (12), a motor (M2) is arranged in a frame (not shown), and the motor (M2) is provided.
A pulley (21) is attached to the. Pulley
A belt (22) is stretched around the pulley (20) and the pulley (21). The motor (M2) is driven by the pulley (2
1) is rotated and the pulley is pulled through the belt (22).
(20) and shaft (19) to convey the conveyor (1
2) rotates. The conveyor (12) also rotates in the direction of feeding the yarn into the feeder ball (23).

The diameter of the pulley (15) is
The conveyor (11) is set for low speed rotation by making it larger than the diameter of (16). On the other hand, the diameter of the pulley (20) is smaller than the diameter of the pulley (21), and the conveyor (12) is set for high speed rotation. And the mode
Intermittent drive is applied to the motor (M1) and the motor (M2).

With the above construction, the rotation speed of the conveyor (12) is sufficiently higher than the rotation speed of the conveyor (11), but the conveyor (11) and the conveyor (12) are rotated.
Are driven independently by different drive sources. Therefore, the driving and stopping of the conveyor (11) and the conveyor (12) are independently controlled. Further, the rotation speed ratio of the conveyor (11) to the conveyor (12) and the drive time in one intermittent drive of each conveyor (11, 12) can be arbitrarily set.

Further, in order to detect the condition of the yarn amount in the feeder ball (23) of the conveyor device (3) and the part feeder (4), the sensors (S1, S2) are used. , S
3, S4) are provided. A sensor (S1) for detecting the presence / absence of a tubing in the conveyor surface of the conveyor (11) and substantially in the center of the conveyor direction is provided. A sensor (S) for detecting the presence or absence of the tubing on the conveyor surface of the conveyor (12) and also at the substantially central portion in the conveyor direction.
2) is provided. In the feeder ball (23),
A sensor (S3) for detecting a predetermined amount of the stored yarn is provided. Also, the conveyor (11)
A sensor (S for detecting the presence or absence of a tubing at a predetermined height position above the end (11a) on the part feeder (4) side of
4) is provided.

A control unit (40) is provided in the conveyor device (3).
Is provided, and the sensors (S1, S2, S3,
S4) is connected to the control unit (40). Further, the control unit (40) controls the motor (M1) and the motor (M
It is also connected to 2). Sensor- (S1, S2, S
3, the signal detected by S4) is sent to the control unit (40),
According to the detected result, the control unit (40) controls the motor.
The drive of each of (M1) and the motor (M2) is controlled. By the control of the control unit (40), even if a large amount or a small amount of piled yarn is unloaded on the conveyor (11), it is cut into pieces little by little and transferred to the conveyor (12), and is almost constant. Adjust the amount of thread to be fed into the feeder ball (23).

Next, the operation of the yarn feeder (1) in the embodiment shown in FIG. 1 will be described. The main operation of the operation of the yarn feeder (1) is to unload the bulk yarns supplied to the unloading device (2) to the conveyor device (3),
The conveyor yarn (3) is used to cut the yarn to adjust the amount of the yarn, and the yarn is fed to the part feeder (4). The yarns separated one by one are discriminated by the hemisphere discriminating unit (5). After that, it is dropped into the aligning shorts (6) and is inserted into the empty tray (27) stopped at the supply station (7) and supplied.

Next, the detailed operation of the yarn feeder (1) will be described. When the empty tray (27) is stopped in the supply station (7) of the tray transfer path (8), the tubing located at the end of the separation conveyor (25) on the feeder ball (23) side is removed. After the top end determination is completed by the top end identification part (5), the part is dropped into the alignment suit (6). The separation conveyor (2
5) The part feeder (4) and the separating conveyor (25) are operated by means not shown so that the yarn is always positioned at the end of the feeder ball (23) side. It is controlled and the yarn in the feeder ball (23) is fed.
The pipe thread dropped in the alignment shoot (6) is guided by the shoot guide (26), is inserted on the empty tray (27), and is supplied.

At the same time, the separation conveyor (25) is activated to send the yarn located at the end of the separation conveyor (25) on the feeder ball (23) side to the top end discrimination section (9). After the supply, and the top end determination section (9) determines the top end, the device waits and prepares for the next supply.

Then, in the supply station (7),
The yarn from the part feeder (4) is supplied to the stopped empty tray. Part feeder (4)
When the remaining amount of the yarn in the double ball (23) becomes small and falls below a predetermined level, the sensor (S3) detects it, and a detection signal is sent to the control section (40). The control unit (40) controls the motors (M1, M2), and moves from the conveyor (12) of the conveyor device (3) to the feeder of the part feeder (4).
An almost constant amount of yarn is fed into the double ball (23).

In the control of the conveyor device (3) of the control unit (40), the conveyor (12) is intermittently driven at a sufficiently high rotation speed ratio with respect to the conveyor (11). Therefore, when piles of the pipe threads unloaded from the unloading device (3) to the conveyor (11) are transferred from the conveyor (11) to the conveyor (12), the piles of the pipe threads at the front end portion of the pile portion are formed. Feeder ball (23)
Dropped inside.

Eventually, when the sensor (S3) detects that the amount of the tubing stored in the feeder ball (23) has reached a predetermined level, a detection signal is sent to the controller (40). Sent to. At this time, the presence of the yarn on the conveyor (12) is detected by the sensor (S2), and if the detection signal reaches the control unit (40), the control unit (4)
0) stops the motors (M1, M2) and turns the conveyor (1
2, 13) are stopped, and the feeding of the yarn to the feeder ball (23) is stopped. However, if the detection signal of the sensor (S2) in which the yarn is not present on the conveyor (12) reaches the control unit (40), the conveyor (12, 1) is immediately
Without stopping 3), the sensor- (S2)
2) Stop after detecting the upper yarn. This is
This is to increase the responsiveness of the supply of the yarn into the double ball (23).

In the unloading device (3), the wagon (9) in which the yarns are piled up is stopped as shown in (9a) by the movable frame (10) located at the lowermost end as in (10a). It is held in position by the movable frame (10). And
By driving the endless chain (28), the wagon (9) is raised together with the movable frame (10), and the guide roller (31) of the movable frame (10) is guided by the guide groove (32).
The yarn in the wagon (9) is unloaded onto the conveyor (11) by being guided and guided by the inclining device. At this time, the wagon (9) is not tilted at a time, but the dog (33) provided on the chain (28) is provided with a three-stage limit switch (35, 36, 3).
7) and contact the limit switches (35, 36,
37) Every time he kicks, he is gradually tilted.

That is, when the dog (33) kicks the limit switch (35), the drive of the chain (28) is stopped for a while, and the angular position is maintained. After that, when the sensor (S1) detects that the yarn is not present on the conveyor (11), the detection signal is sent to the control unit (40), and the unloading request signal is sent from the control unit (40) to the unloading device ( Sent to 3). In the unloading device (3), the chain (28) is driven again in response to the request signal and is rotated until the limit switch (36) is kicked to move the movable frame (1).
0) is further tilted by a certain amount, the driving of the chain (28) is partially stopped, the angular position is held, and the yarn in the wagon (9) is again placed on the conveyor (11). Unload.
Then, when the sensor (S1) again detects that the yarn is no longer present on the conveyor (11), the above is repeated until the limit switch (37) is kicked, and the yarn in the wagon (9) is conveyed to the conveyor. (11) Unload on top. In this way, the wagon (9) is tilted for a while, and the yarn in the wagon (9) is gradually unloaded onto the conveyor (11).

At this time, the amount of the unwound tubing does not necessarily match the tilt angle of the movable frame (10) and may be small or unloaded in many cases. If the former has less load, the sensor
The wagon (9) may be further tilted in accordance with the detection signal of (S1) and the yarn may be unloaded, but if the latter is unloaded in large amounts, it may be piled up on the conveyor (11). Become.

The yarn (B) of the conveyors (11, 12) is fed into the feeder ball (23) for a while, and the piled portion of the yarn is indicated by a chain double-dashed line in FIG. Pipe thread (B
As shown in a), when the sensor (S4) detects that the pile height of the pipe yarn reaches the end portion (11a) of the conveyor (11) and is equal to or higher than a predetermined height, the control unit (40) detects it. A signal is sent. Then, the control unit (40) controls the conveyor (1
1) is temporarily stopped, and only the conveyor (12) is driven at a predetermined rotation speed to feed into the feeder ball (23) while cutting the piled portion of the pipe thread little by little. The pile of pipe thread has been cut down and the conveyor (1
When the sensor (S2) does not detect the yarn for a predetermined time as a result of 2) not carrying the yarn, the sensor (S2)
The conveyor (1) which was stopped until 2) detected the yarn
The step 1) is again intermittently driven for a predetermined time, and the piled portion of the pipe thread is cut off little by little. When the sensor (S2) detects the yarn, the conveyor (11) is stopped again and only the conveyor (12) is driven at a predetermined rotation speed to repeat the above operation.

Accordingly, the piled portion of the yarn reaching the end portion (11a) of the conveyor (11) is appropriately broken when the pile of the yarn is transferred to the downstream conveyor (12). Then, a substantially constant amount of the tubing is fed to the feeder ball (2
3) Delivered within. Then, when the yarn in the piled portion is cut off and the sensor (S4) no longer detects the yarn, the conveyor (11) and the conveyor (12) are switched to the normal intermittent drive and the normal feeding state. Becomes

In the embodiment shown in FIG. 2, the conveyor (1
A weir (39) is provided between the end portion (11a) of 1) and the conveyor (12). The weir (39) is, for example, plate-shaped, has a predetermined height and thickness, has the same width as the conveyors (11, 12), and is arranged parallel to the axis (14). The weir (39) is attached to a frame (not shown) so as to be capable of reciprocating vertically, and is operated vertically by a drive source (not shown). A drive source (not shown) is connected to the control unit (40), and the control unit (40) controls the drive source based on the signals of the sensors (S1, S2, S3, S4), and the weir (3
The vertical operation of 9) is also controlled.

As described above, when a large amount of the yarn is unloaded on the conveyor (11), the pile of the yarn (Ba) shown by the chain double-dashed line in FIG.
1) reaches the terminal end portion (11A), and detects the yarn from the sensor- (S
When 4) detects, the weir (39) projects upward by a predetermined amount from the conveying surface of the conveyor (11), dams a predetermined amount of piles of pipe yarns, and gradually breaks down the piles of pipe yarns. It is fed into the feeder ball (23).

When the sensor (S2) does not detect the yarn for a predetermined time as a result of the piled portion of the yarn being cut off and the conveyor (12) no longer conveying the yarn, the sensor is detected. -The control unit (40) controls the weir (39) to move downward by a predetermined amount until (S2) detects the yarn, and gradually cuts the piled portion of the yarn. When the sensor (S2) detects the yarn, the operation of the weir (39) is stopped. When the sensor (S2) stops detecting the yarn for a predetermined time, the weir (3
9) so that the control unit (4
0) controls and gradually breaks the piled portion of the pipe thread, and repeats the above operation. Along with this, the piles of pipe yarns are not properly cut and are transferred to the downstream conveyor (12), and the piles of pipe yarns are spilled into the feeder ball (23) as they are. -Avoid the situation where the feeder (7) cannot be supplied.

In the embodiment shown in FIG. 3, the conveyor (1
2) is lower than the conveyor (11) by a predetermined amount, and is arranged so as to be stepwise. The operation of the yarn feeder (1) is similar to that of the above-described embodiment, but when the yarn is transferred from the conveyor (11) to the conveyor (12), in the embodiment shown in FIG. There was a crotch yarn,
In the embodiment shown in FIG. 2, the conveyor (11) and the conveyor (12) are dropped due to a step, and the pile of pipe threads is more easily broken.

In the above embodiment, when the sensor (S4) detects the yarn, the upstream conveyor is temporarily
An example of stopping and switching to the operation of driving only the downstream conveyor at a predetermined rotation speed was shown, but the normal rotation speed of the upstream conveyor is slower, or the downstream conveyor rotation speed is faster. Change to the rotation speed ratio
The pile of pipe threads may be cut off little by little. further,
The driving time of the intermittent driving may be changed so that the piled portion of the pipe thread is gradually broken. In this way, it is possible to select a setting in which an appropriate amount of the yarn is fed into the feeder ball depending on the situation such as the shape of the yarn.

Further, in the above embodiment, the sensor
(S2) uses the detection type only at one place, such as the presence or absence of the yarn, and the sensor (S4) detects the predetermined height of the pile of yarn, but it uses a type that can detect multiple places. The pile height of the yarn on each conveyor is finely detected to finely control the rotation speed ratio, the driving time of the intermittent drive and the moving amount of the weir, and more accurately, the feeder yarn of an appropriate amount is fed. It may be delivered in the package.

Further, an example of control for intermittently driving the upstream and downstream conveyors based on the detection signal of the sensor, stopping the upstream conveyor, or switching the rotation speed ratio or the driving time of intermittent driving will be shown. However, the upstream and downstream conveyors are driven by means such as controlling the rotation speed of the motor that serves as the drive source for the upstream and downstream conveyors or the weir drive source with an inverter. It is also possible to switch over to gradually break down the piled portion of the tube yarn.

Further, although the sensor of the above-mentioned embodiment detects the position and presence / absence of the yarn, the weight of the yarn may be measured to detect the piled amount and presence / absence of the yarn. .
Further, the piled amount of the tubing may be detected by measuring the pressure applied to the weir by the piled tubing.

Further, in the embodiment shown in FIG. 2, the amount of the yarns flowing out from the upper end of the weir is adjusted, but it is set so that a gap is formed between the lower end of the weir and the conveyor, and the lower end of the weir and the conveyor are set. You may make it adjust the quantity of the pipe thread which flows out from the clearance gap.

In the above embodiment, two conveyors are provided and each conveyor is provided with one drive source. However, a plurality of conveyors are provided and at least one conveyor is provided with a drive source. Even when provided, it can be applied. The same can be applied to the case where a plurality of weirs are provided between a plurality of conveyors.

The arrangement of the two drive sources shown in FIG. 1 of the above embodiment, the functions shown in FIG. 2 and the steps of the conveyor shown in FIG. 3 may be used independently. ,
You may use it in combination.

[0045]

As described above, according to the first aspect of the present invention, since the conveyor for feeding a large amount of the fed yarn to the feeder ball is provided with the yarn feeding amount adjusting means, Regardless of whether the number of yarns unloaded on the upstream conveyor is large or small, the yarns are cut when the yarns are transferred from the upstream conveyor to the downstream conveyor, and adjusted to have a substantially constant transfer amount, It is possible to prevent a situation in which a large amount of tubing does not drool into the part feeder at one time and the part feeder cannot be supplied.

According to a second aspect of the present invention, at least one driving source is provided for a plurality of conveyors as a means for adjusting the yarn feeding amount of the yarns, so that the driving and stopping of each conveyor and the rotation speed ratio can be performed on the conveyors. It can be set arbitrarily, and when transferring from the conveyor on the upstream side to the conveyor on the downstream side, piles of the yarn are appropriately cut off, and an appropriate amount of the yarn is supplied into the feeder ball. can do.

According to the third aspect of the present invention, a weir is provided between the conveyors, the weir is moved up and down to regulate the flow of the yarn, and the yarn is piled up appropriately according to the upstream yarn pile state. Can be transferred downstream.

According to a third aspect of the present invention, the front end of the pile of yarn is dropped at a step by a simple method in which the downstream conveyor is lower than the upstream conveyor by a predetermined amount and the conveyors are arranged stepwise. It is easy to cut the piled parts.

[Brief description of drawings]

FIG. 1 is a side view showing a yarn feeder according to a first embodiment of the present invention.

FIG. 2 is a side view showing a yarn feeder of a second embodiment.

FIG. 3 is a side view showing a tubing feeder according to a third embodiment.

[Explanation of symbols]

 1 Conveyor Device 3 Conveyor Device 11 Conveyor on the Upstream Side 12 Conveyor on the Downstream Side 23 Feeder Ball 39 Weir (Adjusting Means) 40 Control Section (Adjusting Means) 41 Steps B Tubing Ba Ba Thread M1 Mode Motor (driving source) M2 motor (driving source) S4 sensor

Claims (4)

[Claims] 1. A fiber yarn supplied in a large amount is fed in small portions.
In a yarn thread supply device having a conveyor device for feeding into a double ball, the conveyor device being composed of a plurality of conveyors arranged in the yarn supply direction, the yarn thread supply level on the conveyor is detected. And a adjusting device for adjusting the transfer amount of the yarn from the upstream conveyor to the downstream conveyor according to the detection result of the sensor. . 2. A drive source is provided for each conveyor device, and the adjusting means changes the speed ratio between the rotation speed of the upstream conveyor and the rotation speed of the downstream conveyor according to the detection result of the sensor. The yarn feeder according to claim 1, characterized in that. 3. The yarn feeder according to claim 1, wherein a weir that operates according to the detection result of the sensor is provided between at least one of the plurality of conveyors as the adjusting means. 4. A step is provided between at least one of the plurality of conveyors so that the downstream conveyor is lower than the upstream conveyor.
The yarn feeder according to any one of claims 1 to 3.