JP2001288628A - Fiber waste recovering apparatus for textile machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber waste recovering apparatus for textile machinery capable of securely raising absorption power up to a set range in starting while maintaining the capacity of a driving source of a blower to the minimum. SOLUTION: This fiber waste recovering apparatus for textile machinery is equipped with a dust box for collecting a fiber waste occurring in each spindle of textile machinery at the end of a frame, a blower for producing a suction air current to the dust box, a detection means for detecting the load value of the suction air current by the blower and a control means for controlling the number of revolutions of the blower so that the load value is in a set range. When the blower is rotated at a high speed in starting and the load value exceeds the upper limit of the set range, the control means carries out a control to change the blower from a high speed to a low speed. Consequently, in the case of a sudden stop of the blower, since the blower starts from a high speed, even if some degree of fiber waste is piled in the dust box, the load value does not reach the lower limit of the set range and the blower does not become uncontrollable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a textile machine for collecting fly waste, lint, dust and the like (hereinafter, simply referred to as "fiber lint") generated in various textile machines such as spinning machines and winders. The present invention relates to a fiber waste collection device.

[0002]

2. Description of the Related Art For example, in a pneumatic spinning machine, a blower and a dust box for generating suction force are provided at an end of a machine base, and fly cotton is constantly sucked and collected from a spinning section of each spinning unit. Or a suction force of the yarn storage means for absorbing the slack of the yarn. However, if fly waste or the like accumulates in the box and the suction pressure decreases, normal spun yarn cannot be manufactured or slack of the yarn cannot be normally absorbed. Therefore, it is necessary to periodically clean the inside of the box.

By the way, if the motor rotation speed of the blower is always constant, the suction force decreases and the inside of the box needs to be cleaned frequently.
It is known to control the rotation speed of a blower motor using an inverter (Japanese Patent Laid-Open No. 6-65820, Japanese Patent Laid-Open No. 11-302931). In JP-A-6-65820 and JP-A-11-302931, when the motor is started, the motor speed is increased to a normal speed, and thereafter, the speed is increased with a decrease in the detected value.

[0004]

However, in Japanese Patent Application Laid-Open Nos. 6-65820 and 11-302931 when the filter box is started in a state where the filter box is not empty, the motor is accelerated only to the normal speed, and thus the negative pressure is reduced. It may not reach the normal range. For this reason, if the filter box is started up in a non-empty state, it may not be possible to generate the minimum required suction force for sucking the fiber waste, and the fiber waste may not be collected.

The present invention has been made in view of the above problems, and an object of the present invention is to ensure that the suction force at the time of start-up is surely within a set range while keeping the capacity of the drive source of the blower to a minimum. It is an object of the present invention to provide an apparatus for collecting fiber waste of a raising textile machine.

[0006]

According to the first aspect of the present invention,
A dust box for collecting fiber waste generated by each weight of the textile machine at the end of the machine stand, a blower for generating a suction airflow to the dust box, a detecting means for detecting a load value of the suction airflow by the blower, and the load value being a predetermined value. Control means for controlling the number of revolutions of the blower so as to be a set range, wherein the control means rotates the blower at high speed at the time of startup, and when the load value exceeds the upper limit of the set range, the This is a fiber waste collection device for a textile machine that performs control to switch the blower from the high speed to the low speed.

According to this, when the blower suddenly stops, the blower is started from a high speed, not from a low speed again. Therefore, even if a certain amount of fiber dust is accumulated in the dust box, the load value is not reduced when the blower is started. Can be reliably raised to the set range. For this reason, the load value does not reach the lower limit of the setting range and the control becomes impossible.

When the dust box is started up in an empty state (a state in which no fiber waste is accumulated in the dust box), the blower rotates at a high speed at the time of starting up, so that the load value of the dust box exceeds the upper limit of the set range. When the load value of the dust box exceeds the upper limit, the control means switches the blower to a low speed. As described above, when the load value exceeds the set range at the time of start-up, the speed is switched to low speed, and when the dust box is empty and the air volume (current value) is the largest, the low speed drive is performed. Can be used to prevent burn-in of the drive source and extend the cleaning cycle. When the fiber dust accumulates in the dust box and the load value reaches the lower limit of the set range, the load value is again set in the set range by switching the rotation speed of the blower from low to high. Can be longer.

According to a second aspect of the present invention, the high speed of the blower is set such that the load value exceeds the upper limit of the set range when the blower is driven at a high speed with the dust box empty. Item 6. A fiber waste collection device for a textile machine according to item 1.

When the blower is driven at a high speed with the dust box empty, the load value is reliably maintained within the set range by a simple control by setting the high speed of the blower so that the drive source of the blower exceeds the rating. be able to.

According to a third aspect of the present invention, the control means includes:
3. The fiber waste collecting apparatus for a textile machine according to claim 1, wherein a high-speed and low-speed set value of the blower and the set range of the load value can be arbitrarily set. 4.

For example, the upper limit of the setting range of the load value is set based on the rating (rated current value) of the drive source for the blower, and the lower limit of the setting range is set based on the minimum load value necessary for normal spinning or splicing operation. I do. By setting the upper limit of the setting range based on the rating of the drive source, without providing a current detector,
The drive source can be used within the rating. The high speed of the blower is set so that when the driving speed of the blower is switched to a high speed, the load value falls within the set range when the fiber debris accumulates in the dust box. In this state, when the blower is driven at a low speed, the load value can be set to be within the set range. As described above, each set value can be arbitrarily changed according to the spinning conditions such as the yarn type and the yarn speed or the spinning environment such as the wet temperature.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, an air spinning machine will be described as an example of a textile machine including a textile waste collection device for a textile machine according to the present embodiment. As shown in FIG. 1, the spinning machine includes a plurality of spinning units 1 arranged in a longitudinal direction of the spinning machine, a fiber waste collecting device 26 provided at an end of the spinning machine, and a spinning machine along a longitudinal direction of the spinning machine. And a work carriage (not shown) that moves.

As shown in FIG. 1, the spinning unit 1 includes a draft section 1a for drawing a sliver (fiber bundle) S, a spinning section 1b for forming a sliver S drawn by the draft section 1a into a yarn y, and a nip. A feeding section 1c for nipping and feeding the yarn y between the roller and the delivery roller, a yarn storage section (slack tube) 1d for sucking the yarn at the time of the splicing operation, and a yarn y generated by the spinning section 1b are packaged into a package p. A winding unit 1e for winding is provided.

The work carriage travels while being guided by rails provided along a number of spinning units 1 arranged in parallel, and has a splicing or doffing device. Then, the spinning unit 1 stops at the position of the spinning unit 1 where the piecing or doffing request is made, and the piecing or doffing operation for the spinning unit 1 is performed. The work cart is provided with a lint box that sucks and collects lint generated during piecing or doffing work.
A lint discharging port on the work cart side and a dust box 2 described later.
The lint and the like in the lint box are paid out to the dust box 2 by matching the lint receiving port 38 provided on the side wall of the lint.
That is, when the work vehicle reaches the lint discharging position at the end of the spinning machine, a shutter provided at the lint receiving port 38 of the dust box 2 is opened, and the lint box of the work vehicle and the dust box 2 communicate with each other. The lint and the like in the waste box are discharged to the dust box 2. When the lint receiving port 38 is thus opened, the negative pressure in the dust box 2 is temporarily reduced.

The fiber waste collection device 26 is provided with the dust box 2
And a negative pressure gauge 23 constituting a detecting means, a blower 39,
The air blower 3 includes a limit switch (see FIG. 5) 43 and a control unit 40 (see FIG. 5) that constitutes control means.
Fiber waste generated at the time of yarn splicing of the spinning unit 1 or the like is collected by the suction force generated at 9.

On the side wall 2a of the dust box 2 on the side of the spinning unit 1, through holes 2b, 2c and 2d are provided.
Each of the through holes 2b, 2c and 2d has a fly waste collecting duct 3,
Waste thread ducts 4 and 5 are provided. The fly waste collection duct 3 is a duct that sucks and transports fly waste generated in the draft section 1a, the spinning section 1b, and the like. The waste thread duct 4 is a duct that communicates with the slack tube 1d. Is a duct that sucks and transports yarn waste generated during yarn cutting. At the end of the waste thread ducts 4, 5, a partition plate 2e
A waste thread filter 6 is disposed between the filter and the bottom plate 2f.
The lint receiving port 38 is provided on a side wall of a room (a lint collecting chamber) surrounded by the side wall 2a, the partition plate 2e, the bottom plate 2f, and the lint filter 6, and the lint receiving port 38 A shutter (not shown) that opens when connected to the cart is provided.

Side wall 2 of blower 39 of dust box 2
g has a through hole 2h, and the main duct 7 is provided in the through hole 2h. A blower 39 is connected to the main duct 7 via an intermediate short cylinder 10. In addition, the top plate 2i is located beyond the opening 19 on the entrance side of the main duct 7.
A fly filter 22 is disposed between the bottom plate 2f and the bottom plate 2f. That is, the main duct 7 is provided between the fly waste filter 22 and the blower 39.

The top plate 2i of the dust box 2 has through holes 2
j, and a through hole 7 a is also provided in the upper part of the main duct 7. A polygonal bypass duct 17 formed in a substantially inverted U-shape is connected to the through holes 2j and 7a. Further, a switching member 18 described later is provided in the through hole 7a. Opening 17 at the entrance of bypass duct 17
In c, a fly waste filter 24 is provided. When the switching member 18 shields the main duct 7 on the top plate 2i of the dust box 2, the suction force passing through the bypass duct 17 causes the flapper 21 to shield the opening 3a on the outlet side of the fly waste collection duct 3. Flapper 2
1 is provided rotatably.

As shown in FIGS. 1 and 2, the switching member 18 includes a bypass duct shielding plate 18a for shielding the opening 17a of the bypass duct 17 connected to the main duct 7 in a horizontal state, and a bypass in a horizontal state. Parallel to the duct shielding plate 18a and the bypass duct shielding plate 18
a of the main duct and a shielding plate 18b for the main duct, which is located below the a. A horizontal shaft 18c protrudes from the dust box 2 side of the side surface 18a 'of the bypass duct shielding plate 18a facing the longitudinal direction of the spinning machine (the axial direction of the rotating shaft 11 of the impeller 8). The bypass duct shielding plate 18a is configured to be rotatable about the horizontal shaft 18c by supporting the 18c on a shaft hole or bearing (not shown) formed on the side wall of the main duct 7. . Further, one of the side surfaces 1b of the opposing side surfaces 18b 'of the main duct shielding plate 18b along the longitudinal direction of the spinning machine (the axial direction of the rotating shaft 11 of the impeller 8).
On the dust box 2 side of 8b ', a horizontal shaft 18d protrudes, and the horizontal shaft 18d is supported by a shaft hole or bearing (not shown) formed on the side wall of the main duct 7. A horizontal shaft 18e that penetrates the side wall of the main duct 7 is attached to the other side surface 18b ', and a rotation shaft extending perpendicularly to the horizontal shaft 18e is provided at an end of the horizontal shaft 18e. The lever 18f is attached. Further, the horizontal axis 18c of the bypass duct shielding plate 18a
Side 18a ', which is located on the opposite side to the side on which is attached, and the horizontal shafts 18d, 18 of the main duct shielding plate 18b.
A link 18g is pivotally supported on the side surface 18b 'located on the side opposite to the side where e is attached.

As described above, the shield plate 18 for the bypass duct is provided.
a and the horizontal axis 18c, 18d, 18e, which is the rotation center at the time of switching,
Since the bypass duct shielding plate 18a and the main duct shielding plate 18b are set at positions farther away from the impeller 8 than the centers thereof, the role of the guide plate can be reliably fulfilled during bypass.

The side wall 17b of the bypass duct 17 on the dust box 2 side extends beyond the top plate 7b of the main duct 7 and the horizontal axes 18d and 18 of the shielding plate 18b for the main duct.
e, and extends vertically downward. Then, the top plate 7b of the main duct 7 and the opposed vertical side walls 7c, 7d
Of the opening surrounded by the bottom plate 7e and the portion shielded by the side wall 17b of the bypass duct 17 on the dust box 2 side, the opening 19 is formed.

The bypass duct shielding plate 18a and the main duct shielding plate 18b are both horizontal, and the bypass duct shielding plate 18a is
When the rotating lever 18f is rotated clockwise from the state where the shutter 7a is shielded, as shown in FIGS. 3 and 4, the main duct shielding plate 18b is rotated clockwise around the horizontal shafts 18d and 18e. That is, the link 1 rotates in the dust box 2 direction, and the link 1
The bypass duct shielding plate 18a is also configured to rotate in the same direction via 8g. When the shielding plate 18b for the main duct comes into contact with the rod-shaped stopper / seal packing member 20 provided on the bottom plate 7e of the main duct 7 and shields the opening 19 located on the dust box 2 side, the rotation is made. The clockwise rotation of the lever 18f is stopped. When the main duct shielding plate 18b abuts the stopper / seal packing member 20 provided on the bottom plate 7e of the main duct 7, and shields the opening 19 located on the dust box 2 side, the bypass duct shielding plate The shield plate 18a and the shield plate 18b for the main duct are configured to be inclined toward the blower box 9 side. In a state where the bypass duct shielding plate 18a and the main duct shielding plate 18b are inclined toward the blower box 9, the top plate 7b of the main duct 7 is located at a position facing the inclined bypass duct shielding plate 18a. Has an inclined surface 7b 'substantially parallel to the inclined bypass duct shielding plate 18a.

The limit switch 43 (see FIG. 5) is a detecting means for detecting switching to the suction path from the bypass duct 17 to the main duct 7, and turns the turning lever 18f to turn off the bypass duct shielding plate 18a. When the switch shields the opening 17a on the outlet side of the bypass duct 17, the limit switch 43 is provided at an appropriate position so as to be turned on. The limit switch 43 detects an operation in a cleaning operation, and may detect an opening / closing operation (not shown) on the side surface of the dust box 2. After switching the suction path to the bypass side, the operator can open the opening / closing door and clean the inside of the dust box 2.

As shown in FIG. 1, the negative pressure gauge 23 is provided on the bottom plate 2f between the waste thread filter 6 and the fly filter 22 so as to measure the pressure in the dust box 2. In addition, since the negative pressure gauge 23 measures a decrease in suction force due to clogging of the fly waste filter 22, if the negative pressure gauge 23 is provided on the upstream side of the fly waste filter 22, it is not provided on the bottom plate 2f. You may.

The blower 39 includes a blower box 9, an impeller 8 as a rotating body, and a blower motor 13.
The rotation of the impeller 8 generates a suction airflow in the main duct 7. The driving force of the blower motor 13 includes the drive shaft 14 of the blower motor 13, the pulley 1
5, the belt 16, the pulley 12, and the rotating shaft 11 of the impeller 8 are transmitted to the impeller 8 housed in the blower box 9.

As shown in FIG. 5, the control section 40 includes a controller 41 and an inverter 42, and executes various calculations to generate signals for controlling the operation of each section of the fiber waste collection device 26. Then, an operation command is output to each unit of the fiber waste collection device 26 according to the calculation result. Controller 4
The signal generated in 1 is supplied to the lamp 45 and the inverter 42.

The controller 41 controls the rotation of the blower motor 13 and the ramp 45 based on information from the timer 41a, the negative pressure gauge 23, the limit switch 43, and the input means 44.
The lighting of is controlled. Specifically, the controller 41
At the time of startup, a command to increase the rotation of the blower motor 13 is output. Further, a negative pressure value in the dust box 2 detected by the negative pressure gauge 23 is fetched, and this negative pressure value is compared with a setting range of the negative pressure value previously input by the input means 44,
If the negative pressure value exceeds the upper limit of the setting range at startup,
A command to reduce the rotation of the blower motor 13 is output.
Further, when the negative pressure value falls below the lower limit value of the set range (determined based on the required minimum suction pressure), the timer 41 a
When the negative pressure value falls below the lower limit for t seconds or more (for example, several seconds or more), a command to increase the rotation of the blower motor 13 is output to the inverter 42. When the negative pressure value falls below the lower limit while the blower motor 13 is rotating at a high speed, the timer 41a starts counting, and when the negative pressure value falls below the lower limit for more than t seconds (for example, several seconds or more), the lamp is turned on. A command (notification signal) for turning on 45 is output. When the ON signal of the limit switch 43 is detected and the negative pressure value exceeds the upper limit, a command to turn off the lamp 45 is output.

The upper limit of the setting range of the negative pressure value is set based on the rating of the blower motor 13 (for example, the rated current value). This is because the blower motor 13 can be used within the rating without providing a current detector. Further, the lower limit of the setting range of the negative pressure value is set based on the minimum negative pressure value necessary for normal spinning or splicing operation. The high-speed target value of the blower 39 is as follows.
The negative pressure value is set so as to fall within the set range when the driving speed of the drive 9 is switched to high speed. The low-speed target value of the blower 39 is the same as that of the blower 3 when the dust box 2 is empty.
9 is driven at a low speed, the negative pressure value is set to be within a set range.

The maximum speed of the blower motor 13 is set so that the blower motor 13 exceeds the rating when the fly waste is empty in the dust box 2 (maximum flow rate).
A minimal capacity blower motor 13 is used. In a state where a predetermined amount of fly waste is accumulated, even if the blower motor 13 is accelerated to the highest speed, the blower motor 13 does not exceed the rating.

Next, the operation of the fiber waste collecting apparatus of the textile machine based on the above configuration will be described with reference to the flowchart of FIG. 6 and FIG. First, a case where the dust box 2 is started up in an empty state (a state in which no fiber waste is accumulated) will be described. When the spinning machine starts up, the fiber waste collecting device 26 of the textile machine starts up at the same time. As shown in section A of FIG.
The blower 39 accelerates to a high-speed target value at the time of startup according to a command from the controller 41, and rotates at high speed (S1). As described above, the high-speed rotation at the start-up is performed even when a certain amount of fiber dust is accumulated in the dust box 2 at the start-up. It is to make it.

When the suction force is generated in the dust box 2 through the main duct 7 by the rotation of the blower 39 and the inside of the dust box 2 becomes a negative pressure, the controller 41 takes in the negative pressure value from the negative pressure gauge 23 and reads the negative pressure value. (S2). When the negative pressure value in the dust box 2 is equal to or more than the upper limit (S2, YES), the blower 39 is decelerated to the low-speed target value (S3). In this way, by reducing the speed of the blower 39, it is possible to prevent burn-in of the blower motor 13 and to prevent waste of energy.

When the rotation speed of the blower motor 13 is maintained at a constant low speed, the negative pressure value in the dust box 2 gradually decreases with the accumulation of fiber waste as shown in section B of FIG. When the negative pressure value falls below the lower limit value (S4, YE
S), the controller 41 determines whether the blower motor 13 is rotating at high speed (S5). The blower motor 13
Since the rotation is maintained at a low speed (S5, NO),
The controller 41 determines whether or not the negative pressure value is below the lower limit value for several seconds (S6). When the negative pressure value falls below the lower limit value for several seconds or more (S6, YES), the controller 41
The blower motor 13 is accelerated to a high-speed target value via the inverter 42 (S1).

In S6, the blower motor 13 is rotated at a high speed when the negative pressure value falls below the lower limit value for several seconds or more when the negative pressure value falls below the lower limit value within several seconds.
For example, if the negative pressure value is temporarily lower than the lower limit value due to the catch of fly waste or the work vehicle, the negative pressure value may immediately return to the immediately preceding negative pressure value. Here, the reason why the negative pressure value temporarily falls below the lower limit value in relation to the work vehicle will be specifically described. The work cart is provided with a lint box. When collecting lint generated during the splicing or doffing operation, the litter box discharges the lint in the lint box to the dust box 2. At that time, when a shutter (not shown) is opened in order to make the lint box on the work cart communicate with the dust box 2, the lint receiving port 38 of the dust box 2 is opened and the negative pressure value in the dust box 2 decreases. It is.

In S1, when the blower motor 13 accelerates to the high-speed target value, the negative pressure value increases again as shown in the section C of FIG. However, since the negative pressure value does not exceed the upper limit value (S2, NO), the rotation speed of the blower motor 13 is maintained at a constant high speed. When the rotation speed of the blower motor 13 is maintained at a constant high speed, the negative pressure value in the dust box 2 decreases again with the accumulation of fiber waste. Then, when the accumulation amount of fiber waste reaches a predetermined allowable limit, the negative pressure value falls below the lower limit value again as shown in section D. When detecting that the negative pressure value has fallen below the lower limit value (S4, YES), the controller 41 determines whether the blower motor 13 is rotating at high speed (S5). Since the blower motor 13 is maintained at a high rotation speed (S5, YES), the controller 41 determines whether the negative pressure value is below the lower limit for several seconds or more (S7). When the negative pressure value falls below the lower limit value for several seconds or more (S7, YES), a command to turn on the lamp 45 is output (S8).

When the lamp 45 is turned on, the worker can know that the amount of accumulated fiber waste has reached the allowable limit, and cleans the dust box 2. First,
As shown in FIG. 3 and FIG.
By turning f, the opening 19 of the main duct 7 is shielded. When the opening 19 of the main duct 7 is shielded, the flapper 21 rotates in the direction of the opening 3a of the fly waste collection duct 3 due to the negative pressure in the bypass duct 17, and shields the opening 3a of the fly waste collection duct 3. I do. When the opening 3a of the fly waste collecting duct 3 is shielded, the fly waste collecting duct 3 communicates with the bypass duct 17, and the suction airflow is switched from the dust box 2 to the bypass duct 17.

As shown in a section E of FIG. 7, while the suction airflow is switched to the bypass duct 17, the blower motor 1 is controlled so that the inside of the bypass duct 17 has a predetermined negative pressure value.
3 is maintained at a high speed. The bypass duct 17
Although the cross-sectional area is smaller than that of the dust box 2 and the pressure loss of the path is large, the negative pressure value can be maintained within the set range even when switching to the bypass duct 17 by rotating the blower at high speed. is there.

After completing the cleaning (removal of the fly waste adhering to the fly waste filter 22), the operator turns the rotating lever 18f again to cover the opening 17a of the bypass duct 17 and suck the suction. The airflow is switched from the bypass duct 17 to the dust box 2. At this time, when the opening 17a of the bypass duct 17 is blocked, the limit switch 43 is turned on, and the controller 41 causes the suction airflow to return from the bypass duct 17 to the dust box 2 again.
Is detected (S9, YES). Next, the controller 41 takes in the negative pressure value in the dust box 2 from the negative pressure gauge 23 and compares it with the upper limit of the setting range of the negative pressure value (S10). By cleaning, the inside of the dust box 2 becomes empty again as at the time of startup, and
Since the blower motor 13 is kept rotating at a high speed, the negative pressure value in the dust box 2 returns to the upper limit or more as shown in the section A ′ in FIG. 7 (S10, YES). For this reason, the controller 41 outputs a command to turn off the lamp 45 and decelerates the blower 39 to a low-speed target value (S11). Note that, after the section B ', the processing after S4 is repeated.

In S9, even if the controller 41 detects that the suction airflow has been switched from the bypass duct 17 to the dust box 2 again (S9, YES9),
The reason why the command to turn off the lamp 45 is not output immediately is
By maintaining the lamp 45 in the ON state until the negative pressure value exceeds the upper limit of the set range, it is possible to prevent an operator from forgetting to clean or leave fiber dust in the dust box 2 due to insufficient cleaning. is there.

Next, a description will be given of a case where the dust box 2 is started in a state in which some fiber waste is accumulated. When the spinning machine 25 is started, the fiber waste collecting device 26 of the textile machine
Also starts at the same time. The blower 39 accelerates to a high-speed target value at the time of startup according to a command from the controller 41, and rotates at high speed (S1). As described above, the high-speed rotation at the start-up is performed even when a certain amount of fiber dust is accumulated in the dust box 2 at the start-up. It is to make it.

The rotation of the blower 39 causes the dust box 2
When the suction force is generated inside the dust box 2 and the pressure inside the dust box 2 becomes negative, the controller 41 takes in the negative pressure value from the negative pressure gauge 23 and compares it with the upper limit of the setting range of the negative pressure value (S2).
If the negative pressure value in the dust box 2 does not reach the upper limit even if the blower 39 is rotated at a high speed after being started with a certain amount of fiber dust accumulated in the dust box 2 (S
(2, NO), the blower 39 is maintained at high speed without deceleration.

When the rotation speed of the blower motor 13 is maintained at a constant high speed, the negative pressure value in the dust box 2 decreases with the accumulation of fiber waste. When the negative pressure value falls below the lower limit value (S4, YES), the controller 41 determines whether the blower motor 13 is rotating at high speed (S5).
Since the blower motor 13 is maintained at the high speed rotation (S5, YES), the controller 41 determines whether the negative pressure value is below the lower limit for several seconds or more (S5).
7). When the negative pressure value falls below the lower limit value for several seconds or more (S7, YE
S), and output a command to turn on the lamp 45 (S)
8). Subsequent processes (S9 to S11) are the same as those performed when the dust box 2 is started up in an empty state, and a description thereof will be omitted.

The embodiment is not limited to the above, and may be embodied as follows, for example.

(1) In this embodiment, the negative pressure gauge 23 is used as the detecting means for detecting the load value. However, the present invention is not limited to the negative pressure gauge 23 as long as the load value can be detected. For example, when the load value is detected by measuring the flow velocity in the dust box 2, a flow velocity meter is used.

(2) The position where the limit switch 43 is provided may be any position as long as it can detect that the bypass duct shielding plate 18a shields the opening 17a on the outlet side of the bypass duct 17. The means for detecting switching from the bypass duct 17 to the main duct 7 is not limited to the limit switch 43, but may be an operation switch.
In this case, when the operator presses the operation switch at the end of the cleaning, the controller 41 detects switching from the bypass duct 17 to the main duct 7.

(3) The switching member 18 and the flapper 21
The configuration is not limited to the above-described configuration, as long as it can switch between the main duct 7 and the bypass duct 17. In the present embodiment, the bypass duct 17 is provided above the dust box 2,
The position where the bypass duct 17 is provided is not limited to the position described above.

(4) When the accumulation amount of fiber waste reaches a predetermined allowable limit and the negative pressure value falls below the lower limit of the set range, the controller 40
Has been described as outputting a command (notification signal) for turning on the lamp 45 as an information signal relating to cleaning. However, the accumulation amount of fiber waste has reached a predetermined allowable limit, and the negative pressure value has fallen below the lower limit of the set range. The means for notifying the user is not limited to the lamp 45. For example, a warning may be displayed on a monitor, or an alarm may be used.

(5) In the present embodiment, a spinning machine has been described as an example of a textile machine provided with a fiber waste collecting device of a textile machine. However, a textile machine provided with a fiber waste collecting device is not limited to a spinning machine. A roving frame, a ring spinning frame or an automatic winder may be used.

(6) In this embodiment, the upper limit of the setting range of the negative pressure value is set based on the rating of the blower motor 13 (for example, the rated current value).
Although the setting is made based on the minimum negative pressure value necessary for normal spinning or splicing operation, the present invention is not limited to this.

The inventions other than those described in the claims that can be grasped from the above embodiment will be described below together with their effects.

(1) The textile waste of the textile machine according to any one of claims 1 to 3, wherein the textile machine is an air spinning machine that spins while constantly sucking the textile waste (wool fly) from the spinning unit. It is a recovery device. Here, the spinning unit is a part that generates a spun yarn by twisting the fiber bundle formed by collecting untwisted short fibers by applying a swirling airflow.

(2) According to (1), a normal spun yarn can be manufactured while constantly sucking fiber waste from the spinning section of each spindle, and the cleaning period of the collecting device is lengthened, and the abnormal load of the blower is caused. The unexpected stop can be minimized.

[0053]

According to the first aspect of the present invention, when the blower suddenly stops, the blower is started from a high speed instead of a low speed again, so that a certain amount of fiber dust is accumulated in the dust box. However, the load value can be reliably increased to the set range at the time of startup. For this reason, there is an effect that the load value does not reach the lower limit of the setting range and control becomes impossible. When the load value exceeds the set range at startup, the speed is switched to low speed. When the dust box is empty and the air volume (current value) is the highest, low-speed drive is used, and a drive source with the minimum capacity is used. As a result, it is possible to prevent burn-in of the driving source and to lengthen the cleaning cycle. In addition, when fiber dust accumulates in the dust box and the load value reaches the lower limit of the set range, the load value again enters the set range by switching the rotation speed of the blower from low to high. Can be made longer.

According to the second aspect of the present invention, when the blower is driven at a high speed with the dust box empty, the load value can be controlled by a simple control by setting the high speed of the blower so that the drive source of the blower exceeds the rating. Can be reliably maintained in the set range.

According to the third aspect of the present invention, the high-speed and low-speed setting values of the blower and the setting range of the load value can be arbitrarily set. There is an effect that each setting value can be arbitrarily changed according to the spinning environment.

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating a fiber waste collection device of a textile machine according to an embodiment.

FIG. 2 is a diagram illustrating a switching member according to the embodiment.

FIG. 3 is a diagram illustrating a state in which the suction airflow is switched to a bypass duct.

FIG. 4 is a diagram illustrating a switching operation of a switching member according to the embodiment.

FIG. 5 is a diagram illustrating a configuration of a control unit according to the embodiment.

FIG. 6 is a flowchart illustrating the operation of the fiber waste collection device of the textile machine according to the embodiment.

FIG. 7 is a timing chart showing a relationship among a negative pressure value in a dust box, a rotation speed of a blower motor, and lighting of a lamp.

[Explanation of symbols]

 2 Dust Box 7 Main Duct 13 Blower Motor (Drive Source) 17 Bypass Duct 18 Switching Member 23 Negative Pressure Gauge (Detection Means) 26 Fiber Waste Collection Device 39 Blower 40 Control Unit (Control Means) 43 Limit Switch 45 Lamp

Claims (3)

[Claims] 1. A dust box for collecting fiber waste generated at each weight of a textile machine at an end of a machine stand, a blower for generating a suction airflow to the dust box, and a detecting means for detecting a load value of the suction airflow by the blower. Control means for controlling the number of revolutions of the blower so that the load value falls within a predetermined set range, wherein the control means rotates the blower at high speed at startup, and the load value is an upper limit of the set range. A fiber waste collection device for a textile machine that performs control to switch the blower from the high speed to the low speed when the air blower exceeds the threshold. 2. The fiber according to claim 1, wherein the high speed of the blower is set such that the load value exceeds the upper limit of the set range when the blower is driven at a high speed with the dust box empty. Machine for collecting fiber waste. 3. The fiber waste of a textile machine according to claim 1, wherein the control means can arbitrarily set a high-speed and low-speed set value of the blower and the set range of the load value. Collection device.