JPH08141264A - Device for removing thread remaining in bobbin - Google Patents

Abstract

PURPOSE: To automatically and completely remove threads remaining in a bobbin with simple configuration. CONSTITUTION: A bobbin thread end M hanging down from a bobbin case 8 housing a bobbin is blown into a working position by an air nozzle 51, whereas at least one of the winding members 50A, is moved forward by moving means 60 through 62 to sandwich the bobbin thread M blown in by the air nozzle 51 between the winding members 50A, 50B, and these winding members 50A, 50B are rotated by moving means 80a, 80b, 81 through 84 to wind thread remaining in the bobbin around them. The device is constructed without using structurally complex parts such as elastic wire parts and such other parts as pull-out plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin residual thread removing device.

[0002]

2. Description of the Related Art In a sewing machine for sewing using an upper thread and a lower thread, particularly for an industrial sewing machine that performs high-speed sewing work, it is necessary to frequently replace a bobbin wound with a lower thread. is there. Generally, when the bobbin thread is consumed, the sewing machine operation is temporarily stopped, the bobbin case is removed from the hook, the bobbin thread is wound around the bobbin, and the bobbin on which this bobbin thread is newly wound is placed in the bobbin case. A series of operations for accommodating and mounting the bobbin case in the shuttle are performed manually.

[0003]

However, the manual operation of winding the bobbin around the bobbin and the replacement operation of the bobbin case are extremely inefficient and cause a decrease in productivity.

Therefore, the present applicant has attempted to solve the above problems in the bobbin thread feeder of the sewing machine described in Japanese Patent Application Laid-Open No. 5-192476, which has been previously filed. Japanese Patent Application No. 5-203612 proposes a device that can automatically remove residual yarn.

The outline structure of the bobbin thread supply device of the sewing machine disclosed in Japanese Patent Laid-Open No. 5-192476 is such that a bobbin around which a bobbin thread is wound is housed inside, and a bobbin case is mounted in the sewing machine hook. A bobbin case gripping means (electromagnetic attraction head) capable of gripping and releasing the bobbin case and a moving means including a rotating arm capable of rotating the bobbin case gripping means about one axis as a fulcrum and sliding in the axial direction. A bobbin changing device and a bobbin winding device that is arranged axially away from the shuttle and winds a bobbin around the bobbin.

In addition to the above-mentioned device, the device described in Japanese Patent Application No. 5-203612 has a yarn removing shaft and one end fixed to the yarn removing shaft and arranged around the yarn removing shaft so as to extend in the axial direction. A winding means composed of a plurality of elastic linear bodies projecting to
Receiving the wind-up means facing the wind-up means, the elastic linear body is expanded outward with the fixed end as a fulcrum, and the receiving shaft is rotated together with the wind-up means. A guide member that is disposed further to the side opposite to the bobbin case than the means, and that guides the lower thread end portion that hangs from the bobbin case that accommodates the bobbin inside so that it can be clamped between the receiving shaft and the winding means Between the winding means which is arranged around the winding means and retracts, a handling plate capable of handling and removing the residual thread wound around the winding means, and a residual thread removing device comprising: Predetermined length derived from bobbin case (about 35
The lower thread end portion of (40 mm) is guided by the guide member and is clamped between the receiving shaft and the thread removing shaft,
By rotating the winding means, the residual yarn wound around the bobbin is wound around the elastic linear body, and then the winding means is retracted to remove the elastic linear body from the receiving shaft,
By returning the stretched elastic linear body to its original position, causing looseness between the elastic linear body and the wound residual thread, and handling the wound residual thread by the handle plate. The remaining thread is dropped and removed.

In the bobbin thread automatic feeding device, the bobbin case gripping means is turned into the shuttle, the residual thread removing device and the bobbin thread winding device by pivoting about one axis of the pivot arm. With a movable structure, bobbin winding work, residual yarn removal work, and bobbin case replacement work are performed automatically, improving work efficiency and productivity. It is designed to be used.

However, the above-mentioned Japanese Patent Application No. 5-20361.
The apparatus described in No. 2 has the following problems. That is, in the above residual thread removing device, complicated parts having a structure such as an elastic linear body are used, and since a member such as a handle plate is required to increase the number of parts, the cost of the device is increased. There is a problem of doing.

Further, when the bobbin thread is opened / closed when the elastic linear body is opened / closed or when it is scraped off by the handle plate, the elastic linear body or the handle plate is caught or entangled, and the wound residual yarn cannot be discharged properly. There is also a problem that the reliability of the device is reduced.

Therefore, it is a first object of the present invention to provide a bobbin residual yarn removing device which has a simple structure and is capable of automatically removing the bobbin residual yarn automatically.

Further, in addition to the first object, the present invention has a second object to provide a bobbin residual thread removing device capable of reliably discharging the wound residual thread and improving reliability. And

[0012]

In order to achieve the first object, a bobbin residual yarn removing device according to a first aspect of the present invention is a bobbin rotatably supported and a bobbin case accommodating the bobbin inside. It is arranged so as to be coaxially opposed to the air nozzle that blows the lower end of the lower thread to the working position, at least one of which can be moved forward and backward in the axial direction by the moving means, and at least one of which can be rotated by the driving means. A pair of winding members, and the lower yarn end portion blown to the working position by the air nozzle is clamped between the winding members when at least one of the winding members advances. The bobbin residual yarn can be wound around by rotating the member.

In order to achieve the above second object, the bobbin residual yarn removing device according to a second aspect is the same as that of the first aspect, in which the winding member has a truncated conical trapezoidal shape in which the opposing surface is a small diameter surface. It is characterized by

In order to achieve the above-mentioned first or second object, the bobbin residual yarn removing device according to a third aspect of the present invention is the same as the first or second aspect, and in addition to the first or second aspect, another moving means is provided coaxially with the winding member. With the yarn end guide shaft, the yarn end guide shaft can be moved forward and backward in the axial direction and can hold the lower yarn end portion blown to the working position by the air nozzle when moving forward.

[0015]

According to the bobbin residual thread removing device of the present invention, the lower thread end portion that hangs down from the bobbin case having the bobbin accommodated therein is blown to the working position by the air nozzle, and at least one of them is moved by the moving means. The bobbin residual yarn is wound around when the winding member moves forward and the lower yarn blown by the air nozzle is sandwiched between the winding members, and these winding members are rotated by the driving means. This structure is simple because it does not use complicated parts such as elastic linear members or members such as handle plates.

According to the bobbin residual yarn removing device of the second aspect, when at least one of the winding members retracts by the moving means, the conical frusto-conical winding member has a facing surface of a small diameter. The residual yarn wound around it falls naturally along the tapered surface and is reliably discharged.

According to the bobbin residual yarn removing device of the third aspect, when the yarn end guide shaft advances on the same axis of the winding member by another moving means, the lower yarn blown to the working position by the air nozzle. The end portion is held by the yarn end guide shaft while being prevented from fluttering, and is reliably sandwiched between the winding members when the moving means advances at least one of the winding members.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, an outline of an automatic bobbin thread feeder to which the bobbin residual thread remover of the present invention is applied will be described with reference to FIGS.

This automatic bobbin thread feeder is provided with a sewing machine bed 1.
Is placed in the space where the bottom below is an oil reservoir,
As shown in FIGS. 5 and 6, the bobbin case attachment / detachment position A, the residual thread removal position B, and the bobbin thread winding position C are 120 around a single axis.
As shown in FIGS. 5 to 7, the bobbin case attachment / detachment position A and the other work positions B and C are divided on both end sides of the one shaft, and are erected in the space. Column 2, a main base 3 mounted on the column 2, a guide shaft 4 that is the one shaft horizontally supported by the main base 3, and the guide shaft 4 is rotatable with the guide shaft 4 in the axial direction. A rotating arm 5 slidably supported, a forward / backward lever 6 for moving the rotating arm 5 forward and backward along the guide shaft 4, and a drive for rotating the rotating arm 5 forward or backward in units of 60 °. And a device.

As shown in FIG. 8, the guide shaft 4 is rotatably supported by the standing portion of the main base 3 at both ends.
As shown in FIG. 9, the cross section is non-circular, and the shape of the hole of the corresponding boss 5a of the rotating arm 5 is also the same. Therefore, the rotating arm 5 can slide along the guide shaft 4 and can rotate together with the guide shaft 4.

As shown in FIG. 5, the rotating arm 5 extends symmetrically from the center to both sides and slightly bends. A bobbin 7 is built in near each end as shown in FIG. The bobbin case 8 is detachably supported. As a bobbin attaching / detaching mechanism which is a bobbin case gripping means in the rotating arm 5, for example, an automatic bobbin thread feeder of Japanese Patent Laid-Open No. 5-192476 and Japanese Patent Application No. 5-121 previously filed by the present applicant.
Starting from the pair of electromagnet adsorption heads described in the sewing machine bobbin exchanging device of Japanese Patent No. 960, for example, it is described in the sewing machine bobbin exchanging device of Japanese Patent Application No. 5-116363 previously filed by the present applicant. A suitable one such as a lever claw that is used can be adopted, and the point is that the bobbin case 8 can be attached to and detached from the facing member (for example, the shuttle 16) as needed.

As shown in FIGS. 6 and 7, the forward-reverse lever 6 is rotatably supported by a shaft 9 provided upright on the main base 3. A long hole 6a is formed near the free end. The other end is rotatably attached to a shaft 13 fixed to a knuckle 12 at the rod tip of an air cylinder 11 attached to the main base 3 by a support plate 10. Then, the long hole 6a of the forward / reverse lever 6
As shown in FIG. 8 and FIG.
A pin 15 projecting from the surface of a collar 14 rotatably attached to a is engaged. Therefore, when the rod of the air cylinder 11 expands and contracts, the forward / backward lever 6
Rotates in the positive and reverse directions about the axis 9. Along with this, the rotating arm 5 engages with the pin 15 that engages with the long hole 6a of the forward-reverse lever 6.
The vehicle travels forward and backward along the guide shaft 4 via. That is,
The rotating arm 5 has a bobbin case attachment / detachment position A side, which is a sewing position where the shuttle 16 shown in FIGS. 5 and 8 is disposed, and an opposite side thereof (remaining thread removing position B and bobbin thread winding position C). )
Can be moved forward and backward along the guide axis 4.

As shown in FIGS. 6 and 7, the rotation driving device for the rotating arm 5 includes a bracket 1 below the main base 3.
A motor 19 attached to a bracket 18 fixed to 7, and a gear 21 fixed to a rotating shaft 20 thereof,
A gear 22 that is rotatably supported by a bracket 17 and meshes with a gear 21, and an original vehicle 2 fixed to one surface of the gear 22.
3, a pin 24 and a Geneva mechanism composed of a driven wheel 25 rotatably supported by a bracket 17, a gear 26 coaxially fixed to the driven wheel 25, and a gear 26 fixed to the guide shaft 4 (see FIG. 8). And a gear 27 that meshes.
Therefore, by configuring the gear 26 and the gear 27 with a predetermined gear ratio, the rotating arm 5 is rotated by the Geneva mechanism of the rotary drive device by the motor 19 as a drive source in units of 60 ° via the guide shaft 4. .

A bobbin winding device is arranged at the bobbin winding position C. The bobbin winding device may be any device as long as the bobbin can be automatically wound around the bobbin 7 by driving a motor, for example, as disclosed in Japanese Patent Laid-Open No. 5-192476. It is described in the bobbin automatic feeder and the bobbin exchanging device of the sewing machine described in Japanese Patent Application No. 5-121960 and the sewing machine bobbin exchanging device of Japanese Patent Application No. 5-116363 previously filed by the present applicant. Appropriate ones can be adopted including the bobbin winding device.

At the residual yarn removing position B, a residual yarn removing device, which is a feature of the present invention and is shown in FIGS. 1 to 3, is provided. This residual yarn removing device will be described in detail below.

In FIGS. 1 to 3, reference numeral 60 denotes a base plate having a U-shaped cross section which is opened upward, and a moving shaft solenoid 64 and a box-shaped member 62 are provided on the bottom surface of the base plate 60. Each is fixedly placed. Plunger 6 of this moving shaft solenoid 64
A pin 64b is projectingly provided on 4a. On the other hand, the box-shaped member 6
An elongated hole 62a for guiding along the axial direction (the left-right direction in FIG. 1) is formed on the upper surface of 2 (see FIG. 3), and a pin 62b is provided in a protruding manner. This pin 62
A center portion of an arm 63 is rotatably supported by b, and long holes 63a and 63b are formed at both ends of the arm 63, respectively. And, in this long hole 63b,
A pin 64b of the moving shaft solenoid 64 is loosely fitted and arranged.

Above the long hole 62a of the box-shaped member 62,
On both side plates 60a and 60b of the base plate 60, a hollow cylindrical moving shaft 61 movably supported in the axial direction is arranged. The flange 6 is provided at the approximate center of the moving shaft 61.
1a is fixed, and a pin 61b projects from the lower part of the flange 61a. The pin 61b of the flange 61a is a long hole 6 formed on the upper surface of the box-shaped member 62.
The arm 63 is loosely fitted to the armature 2a and is also loosely fitted to the long hole 63a at one end of the arm 63.

Therefore, when the moving shaft solenoid 64 is turned on and the plunger 64a is retracted, the moving shaft 61 moves forward, and when the moving shaft solenoid 64 is turned off and the plunger 64a is pushed out, the moving shaft 61 moves backward. There is.

A yarn clamp tray 50A as a winding member is rotatably supported by a tip end (left end in FIG. 1) of the moving shaft 61 via a bearing (not shown). This thread clamp tray 50A has a truncated cone shape (a shape in which the apex of the cone is cut), and the opposing surface (thread clamp tray 50A).
In A, the arrangement is such that the left side surface in FIG. 1) is the small diameter surface.

A yarn end guide shaft 70 is inserted in the hollow portion of the moving shaft 61. A pin 70a is projectingly provided at the end portion (right end portion in FIG. 1) of the yarn end guide shaft 70, and the pin 70a is loosely fitted in a long hole 71a formed at one end of an arm 71. There is. The other end of the arm 71 is rotatably supported by a pin 72 erected on a bracket portion 60c extending from the side plate 60b of the base plate 60, and a long hole 71b is formed in the center of the arm 71. Has been done. A pin 73b protruding from the plunger 73a of the yarn end guide shaft solenoid 73 fixed to the side plate 60b of the base plate 60 is loosely fitted in the elongated hole 71b.

Therefore, when the yarn end guide shaft solenoid 73 is turned on and the plunger 73a is pulled in, the yarn end guide shaft 70
When the yarn end guide shaft solenoid 73 is turned off and the plunger 73a is pushed out, the yarn end guide shaft 70 is moved backward.

A thread clamp tray 50B is disposed opposite to the same axis as the thread clamp tray 50A. The thread clamp tray 50B has the same shape as the thread clamp tray 50A, and the facing surface (the thread clamp tray 50B has the right side surface in FIG. 1).
Has a small diameter surface. This thread clamp tray 5
OB is fixed to an end of a rotary shaft 84, and the rotary shaft 84 is rotatably supported by both side plates 80a and 80b of the box-shaped member 80. A gear 81 is fixed to the rotary shaft 84, and a gear 82 meshes with the gear 81. The gear 82 is provided on the side plate 80 of the box-shaped member 80.
It is fixed to the output shaft of the drive motor 83 fixed to a.

Therefore, when the drive motor 83 is driven, the rotation thereof is decelerated by the gears 82 and 81 and transmitted to the rotary shaft 84, so that the yarn clamp tray 50B is rotated.

As shown in FIG. 2, the rotary arm 5 of the above-mentioned automatic bobbin thread feeder hangs down from a bobbin case 8 (specifically, under a bobbin thread tension spring) in which a bobbin 7 is housed. An air nozzle 51 that blows the yarn end portion M to the working position is fixed. The working position here is
Roughly speaking, since the lower thread end portion M is sandwiched between the thread clamp trays 50A and 50B, the thread clamp trays 50A and 50B are clamped.
Although it is a position within the small-diameter surface of B, in order to make the accuracy of pinching the yarn end highly accurate, the yarn end guide shaft 70 has an outer peripheral surface (correctly, a lower outer peripheral surface in FIG. 2) at the tip end portion thereof. In contrast, the lower thread end M
Is a position where the lower thread end portion M contacts and flutters downstream (see FIG. 2). When the lower thread end portion M is blown to the working position, the air from the air nozzle 51 is blown toward the outer peripheral surface of the bobbin case 8. , The yarn end guide shaft 70 along the outer peripheral surface
This is accomplished by creating a flow towards the outer peripheral surface of the.

Further, in the residual yarn removing device, an air nozzle 9 for attaching air toward a residual yarn mass (details will be described later) wound around the yarn clamp trays 50A and 50B.
0 is provided (see FIG. 2).

Furthermore, the residual yarn removing device is provided with, for example, a reflection type optical sensor (not shown) as a rotation detecting means. This reflection type optical sensor has a bobbin case 8
Is provided on the open end side of the bobbin 7 so as to face a plurality of existing holes formed in a ring shape on the side surface of the bobbin 7. Therefore, when the bobbin 7 rotates, a continuous pulse wave is output from the reflective optical sensor, and when the bobbin 7 is not rotated, nothing is output from the reflective optical sensor.

The operation of the residual thread removing device thus constructed will be described below with reference to the flowchart of FIG. First, in the automatic bobbin thread feeder, the bobbin case 8 is moved by rotating the motor 19 so that the rotary arm 5 repeats forward / backward movement in units of 60 ° and forward / backward along the guide shaft 4. Each work position A,
It will surely be transported to B and C to execute or receive work.

For example, the bobbin case 8 is not held at one end of the rotating arm 5, and the bobbin case 8 containing the bobbin 7 in which the bobbin is wound by the bobbin winding device is held at the other end, and the bobbin case 8 is held. It is assumed that one end that does not hold is waiting at a position D (see FIG. 6) intermediate between A and B. When the predetermined sewing is completed in this state (step 1), the bobbin case 8 is replaced in step 2.

That is, the rotating arm 5 rotates 60 ° counterclockwise in FIG. 6 and advances to the shuttle side in FIG. 5, and the bobbin case attaching / detaching mechanism allows the bobbin case 8 with a bobbin with residual thread in the shuttle to be inserted. Is held at one end of the rotary arm 5, and then the rotary arm 5 is retracted to the retracted position of the guide shaft 4 and rotated by 180 °, and is moved forward,
A bobbin case 8 with a bobbin built-in, which is held on the other end of the rotating arm 5 and has been wound with a bobbin, is attached to the hook 16 at the bobbin case attaching / detaching position A.
And the rotating arm 5 is retracted.

Then, in step 3, in step 3, the yarn end guide shaft solenoid 73 is turned on to pull in the plunger 73a, and the yarn end guide shaft 70 is moved to the yarn clamp tray 5.
It is projected toward 0B (see FIG. 3A).

Next, in step 4, in step 4, the rotary arm 5 is rotated by 60 ° in the clockwise direction in FIG.
By rotating, the bobbin case 8 containing the bobbin with the residual thread held at one end of the rotating arm 5 is moved to the residual thread removing position B.

Then, in step 5, in step 5, the yarn guiding air is blown from the air nozzle 51 to blow the lower yarn end M hanging from the bobbin case 8 to the working position. Then, the lower thread end portion M blown to the working position by the air nozzle 51 is attached to the thread end guide shaft 7.
With 0, fluttering is suppressed and the state is also held at that position (see FIG. 2).

Then, in step 6, in step 6, the moving shaft solenoid 64 is turned on and the plunger 6
4a, and the thread clamp tray 50A together with the moving shaft 61.
Is advanced toward the thread clamp tray 50B, and the thread clamp tray 50A is pressed against the thread clamp tray 50B (see FIG. 1). At this time, the lower thread end portion M that was held at the working position by the air nozzle 51 and the thread end guide shaft 70
Is clamped between the thread clamp trays 50A and 50B.

Next, in step 7, in step 7, the blowing of air by the air nozzle 51 is stopped and then in step 8, the drive motor 83 is driven to rotate the yarn clamp tray 50B. Then, the thread clamp trays 50A and 50B are, as described above,
Since they are in pressure contact, the thread clamp tray 5 is
0A also rotates together, and these thread clamp trays 50A, 50B
The bobbin residual yarns are wound around them by the co-rotation of (see FIG. 3 (b)).

Then, in step 9, it is determined in step 9 whether or not the residual yarn on the bobbin 7 is removed. This is because when the residual yarn is wound around the yarn clamp trays 50A and 50B by the cooperative rotation of the yarn clamp trays 50A and 50B (remaining yarn removal is performed), the bobbin 7 rotates and winds. If the bobbin 7 is not removed (remaining yarn is not removed), the bobbin 7 does not rotate, and thus it is determined. The presence / absence of this rotation is determined by the output signal from the above-described reflective photosensor.

When it is determined that the bobbin 7 is not rotating, that is, the residual yarn is not removed, the process proceeds to step 10 to retry, and in step 10, the drive motor 83 is stopped and the yarn clamp is performed. The yarn clamp tray 50A is stopped together with the tray 50B, and the process proceeds to step 11. In step 11, the yarn end guide shaft solenoid 73
Is turned off, the plunger 73a is pushed out, and the thread end guide shaft 7
Retract 0 and retract to the initial position, then step 12
Then, in step 12, the moving shaft solenoid 64
Is turned off, the plunger 64a is pushed out, the yarn clamp tray 50A is retracted together with the moving shaft 61 to be retracted to the initial position, and the process returns to step 5. When this retry operation is performed three times in a row, in the present embodiment, an alarm is generated and an operator is notified of an abnormality, assuming that some failure that cannot remove the residual yarn occurs.

On the other hand, if it is determined in step 9 that the bobbin 7 is rotating, that is, the residual yarn is removed, the process proceeds to step 13, and in step 13, is the bobbin 7 stopped this time? If it is determined that the bobbin 7 does not stop and the residual thread removal is still continued, the same determination is repeated until the bobbin 7 stops, while the bobbin 7 stops and the residual thread removal is performed. When it is determined that the process is finished, the process proceeds to step 14, the drive motor 83 is stopped in step 14, the yarn clamp plate 50A is stopped together with the yarn clamp plate 50B, and the process proceeds to step 15.
In step 15, the yarn end guide shaft solenoid 73 is turned off, the plunger 73a is pushed out, the yarn end guide shaft 70 is retracted and retracted to the initial position, and the process proceeds to step 16.

Then, in step 16, the air nozzle 90 moves toward the residual thread block Z (see FIG. 3B) wound around the thread clamp trays 50A and 50B.
Spray air and proceed to step 17, step 17
, The moving shaft solenoid 64 is turned off, the plunger 64a is pushed out, and the moving shaft 61 and the thread clamp tray 50
Retract A and retract to the initial position.

Then, since the shape of the thread clamp trays 50A and 50B is the truncated cone shape in which the opposing surfaces are the small diameter surfaces as described above, the residual thread mass Z is formed along the tapered surface. It falls naturally and is discharged downward. At this time, since the air is blown toward the residual thread cluster Z by the air nozzle 90, the residual thread cluster Z can be dropped and discharged more favorably.

Then, the process proceeds to step 18 and step 1
In 8, the blowing of air by the air nozzle 90 is stopped, and this flow ends.

When the residual yarn is removed in this way, the rotating arm 5 is moved counterclockwise in FIG.
The bobbin case 8 with a built-in empty bobbin from which the residual yarn has been removed is moved to the lower thread winding position C by rotating 0 ° and moving backward, and the lower thread is wound around the empty bobbin by the lower thread winding device. After that, these operations are repeated.

As described above, in the present embodiment, the bobbin case 8 having the bobbin 7 accommodated therein blows the bobbin thread end portion M to the working position by the air nozzle 51, and the moving means 60 to 64 move the thread clamp tray. 50A is advanced to sandwich the lower thread blown by the air nozzle 51 between the thread clamp trays 50A and 50B, and drive means 80-
Since the yarn clamp trays 50A and 50B are rotated by 84 to wind the bobbin residual yarn around, it is possible to automatically remove the bobbin residual yarn automatically. Further, without using a complicated part having a structure such as an elastic linear body or a member such as a handle plate, Japanese Patent Application No. 5-203612 can be used.
Since the device is configured to be simpler than the device described in the specification, it is possible to reduce the cost of the device.

Further, the thread clamp trays 50A and 50B are formed into a truncated cone shape with the facing surface being a small diameter surface, and the moving means 60 is used.
Since the yarn clamp tray 50A is retracted by ~ 64 and the residual yarn wound around the yarn clamp trays 50A and 50B is naturally dropped along the taper surface to be reliably discharged, the reliability of the apparatus is improved. It is possible to improve the sex.

The bobbin thread end portion M blown to the working position by the air nozzle 51 is advanced by moving the thread end guide shaft 70 coaxially with the thread clamp trays 50A and 50B by other moving means 71 to 73. The yarn end guide shaft 70 keeps the fluttering in a held state, and when the yarn clamp tray 50A is moved forward by the moving means 60 to 64, the yarn clamp trays 50A and 5A are moved.
Since it is configured to be reliably sandwiched between 0B, it is possible to further increase the reliability of winding the residual yarn.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say, for example, in the above embodiment, the thread clamp tray 50B is driven and rotated, but the thread clamp tray 50A may be driven and rotated, and the thread clamp tray 50A,
You may make it drive-rotate 50B together.

In the above embodiment, the yarn clamp tray 50A can be moved forward and backward by the moving means 60 to 64, but the yarn clamp tray 50B can be moved forward and backward by the moving means, and the yarn clamp tray can be moved. 50A, 5
Both 0B may be able to move forward and backward by moving means.

Further, the yarn end guide shaft 70 is coaxial with the yarn clamp trays 50A and 50B in order to make the precision of pinching the yarn ends highly accurate, but not near the outer periphery of the yarn clamp trays 50A and 50B. It may be. In the case of such a configuration, it is not necessary to move the yarn end guide shaft 70 forward or backward by the other moving means 71 to 73.

[0058]

As described above, according to the bobbin residual thread removing device of the first aspect, the lower thread end portion that hangs from the bobbin case that houses the bobbin is blown to the working position by the air nozzle and moved. At least one winding member is moved forward by the means to sandwich the bobbin thread blown by the air nozzle between the winding members, and the winding means is rotated by the driving means to wind the bobbin residual yarn around. Since it is configured to take, it is possible to automatically and favorably remove the bobbin residual yarn. Further, without using a complicated component such as an elastic linear body or a member such as a handle plate, Japanese Patent Application No. 5-2
Since the device is configured to be simpler than the device described in the specification No. 03612, it is possible to reduce the cost of the device.

According to the bobbin residual yarn removing device of the second aspect, in addition to the first aspect, the winding member has a frustoconical shape in which the facing surface is a small diameter surface, and at least one of them is moved by the moving means. It is configured to retract the winding member of No. 2 and to naturally discharge the residual yarn wound around the winding member along the taper surface to surely discharge the yarn, so that the reliability of the device is improved. Is possible.

According to the bobbin residual yarn removing device of the third aspect, in addition to the first or second aspect, the yarn end guide shaft is moved forward coaxially with the winding member by another moving means, and air is removed. The lower thread end portion blown to the working position by the nozzle is held by the thread end guide shaft while suppressing fluttering, and is reliably sandwiched between the winding members when the moving means advances at least one winding member. Therefore, it is possible to further increase the reliability of winding the residual yarn as compared with the first and second aspects.

[Brief description of drawings]

FIG. 1 is a plan view of a residual yarn removing device according to an embodiment of the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a side view for explaining the operation of the above residual thread removing device.

FIG. 4 is a flowchart showing an operation procedure of the above residual thread removing device.

FIG. 5 is a perspective view of an automatic bobbin thread feeder to which the above residual thread removing device is applied.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a plan view of FIG.

FIG. 8 is a side view of FIG.

FIG. 9 is a rotary arm that constitutes the same upper and lower yarn automatic feeders.
It is a front view showing the relationship between a forward-backward movement lever and a guide shaft.

[Explanation of symbols]

 7 bobbin 8 bobbin case 50A, 50B winding member 51 air nozzle 60-64 moving means 70 yarn end guide shaft 71-73 other moving means 80-84 drive means M lower thread end

Claims (3)

[Claims] 1. A bobbin that is rotatably supported, an air nozzle that blows a bobbin end that hangs down from a bobbin case that houses the bobbin to a working position, and at least one of which is coaxially opposed to each other. A pair of winding members which can be moved forward and backward in the axial direction by the moving means, and at least one of which can be rotated by the driving means, and the lower thread end portion blown to the working position by the air nozzle. A bobbin residual yarn removing device capable of clamping the bobbin residual yarn around the bobbin by rotating the take-up members while the at least one take-up member advances. 2. The bobbin residual thread removing device according to claim 1, wherein the winding member has a frustoconical shape in which the facing surface has a small diameter surface. . 3. The bobbin residual yarn removing device according to claim 1 or 2, wherein the moving member can be axially advanced / retracted by another moving means coaxially with the winding member, and at the time of the advance, an air nozzle is used. A bobbin residual yarn removing device including a yarn end guide shaft capable of holding a lower yarn end portion blown to a working position.