JPH10279188A - Bobbin replacement device in yarn take-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin exchange device in a yarn take-up device in which doffing of a full package and installation of an empty bobbin can be automatically performed in facilities which are not complicated. SOLUTION: This device comprises a cradle arm 10 to hold a bobbin B for taking up yarn on the bobbin B at a take-up position W of a yarn take-up device to be a package P, moving the package P to a bobbin exchange position R to be released, and holding the bobbin B empty, a package tray 30 extended from around the bobbin replacement position R to the opposite side of the take-up position W to receive the package P, and an empty bobbin supply passage 40 extended from the take-up position W close to the bobbin exchange position upward to supply the empty bobbin B. The cradle arm 10 is opened on the package tray 30 side at the exchange position R, and provided with a wall part 10a which can be engaged with an axial direction end part of the bobbin B. In this case, a gate 41 is pivotally supported at a tip of the empty bobbin supply way 40 on the side of the bobbin replacement position R to be rotatable between a position to disconnect the empty bobbin supply way 40 and a position roughly connected to the empty bobbin supply way 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin changing device for a yarn winding device. More specifically, the present invention relates to a yarn winding device in a textile machine such as a draw false twister (DTY) or a false twister, which doffs a package wound on a bobbin and supplies an empty bobbin. The present invention relates to a bobbin exchanging device for a yarn winding device.

[0002]

2. Description of the Related Art In a draw false twisting machine or the like, a bobbin is rotatably supported between a pair of cradle arms, and a yarn is wound on the bobbin as a package. When the package becomes a full package), the full package is doffed from the cradle arm and an empty bobbin is supplied to the cradle arm.

In Japanese Patent Publication No. 48-38897, a one-way lever is provided on one end of a swing arm having a bobbin bearing at one end, and a cam is provided on which the end of the one-way lever slides by the rotation of the swing arm. When it is full, the swing arm is rotated, the end of the one-way lever is slid into contact with one end of the cam to remove the full bobbin, and by further rotating the swing arm, the one-way lever is disengaged from the cam. There is disclosed a doffing device for a take-up winder in which an empty bobbin is automatically held between the bearings.

In the device disclosed in Japanese Patent Publication No. 48-38897, the swing arm is rotated by an operator operating a lever with his / her foot. The empty bobbin placed on the empty bobbin holding table is held between the swing arm bearings by rotating the swing arm by pedal operation while visually confirming that the bobbin has been removed from the ball receiving table. I am trying to do it.

This device has an advantage that the bobbin can be doffed and the empty bobbin can be gripped by rotating the swing arm. However, in practice, this device works well only when the operator operates the operation pedal while visually adjusting the device, and the automatic machine is such that the operator is not involved in doffing and empty bobbin supply. It is difficult to adjust the timing of discharging a full bobbin and gripping an empty bobbin if it is used as it is.

In view of the fact that the apparatus disclosed in Japanese Patent Publication No. 48-38897 described above is difficult to operate on an automatic machine, the applicant of the present invention has previously described a cradle in Japanese Patent Application Laid-Open No. 5-85669. A device was proposed in which the arm was swung by a motor and the empty bobbin supply arm was driven by another motor, and these operations were operated according to a series of sequences by a control cam.

[0007] This proposed device is also used in an automatic machine in accordance with a sequence, such as swinging of a cradle arm, doffing of a full bobbin from a cradle arm, supply of an empty bobbin by an empty bobbin supply arm, and threading to an empty bobbin. The series of operations described above can be performed mechanically smoothly and is extremely effective.

[0008]

However, in this apparatus, it is necessary to provide each winding device with a driving device for driving the cradle arm and the empty bobbin, respectively, and a control device for controlling the operation thereof in a series of sequences. However, the production cost is high and the maintenance is complicated.

[0009]

SUMMARY OF THE INVENTION The present invention relates to the above-mentioned JP-A-5-85669.
Japanese Patent Application Publication No. 48-38897 discloses an apparatus which is not effective only when operated by a human as disclosed in Japanese Patent Publication No. 48-38897. An object of the present invention is to provide a bobbin changing device of a yarn winding device capable of automatically doffing a full bobbin and mounting an empty bobbin.

[0010]

According to the present invention, a bobbin is gripped, a yarn is wound on a bobbin as a package at a winding position of a yarn winding device, and the package is moved to a bobbin replacing position and released. A cradle arm adapted to grip an empty bobbin, a package tray extending from the vicinity of the bobbin exchange position to the non-winding position side to receive the package, and upward from the non-winding position near the bobbin exchange position. An empty bobbin supply path that extends and supplies an empty bobbin, wherein the cradle arm has a wall portion that is open at the package tray side at the exchange position and is engageable with an axial end of the bobbin; The empty bobbin supply path is rotatable between a position blocking the empty bobbin supply path and a position substantially continuous with the empty bobbin supply path at the end of the bobbin exchange position side. The bobbin exchange apparatus yarn winding apparatus characterized by gate is pivotally supported, to achieve the above object.

In the present invention, when the cradle arm moves from the winding position to the bobbin replacing position, the full bobbin is released by the rotation of the cradle arm and the empty bobbin is gripped. In the present invention, in particular, since the cradle arm has a wall portion that is open on the package tray side at the bobbin exchange position and that can be engaged with the axial end of the bobbin, the cradle arm (cradle chuck) is By opening the bobbin in the axial direction, the bobbin released from the cradle arm is reliably sent out to the package tray using the wall as a guide.

Further, in the present invention, a gate is rotatably provided between a position where the cradle arm is moved to block the empty bobbin supply path and a position where the bobbin supply path is substantially parallel to the empty bobbin supply path. Is pivoted. For this reason, the movement of the empty bobbin supplied from the empty bobbin supply path to the package tray side is prevented by the gate,
As a result, the empty bobbin is held between the wall and the gate, that is, between the left and right palms, and the cradle arm is closed in this state, so that the empty bobbin is securely held by the cradle arm. Then, the empty bobbin is moved to the winding position.

In order to further ensure the above-mentioned operation, the gate is located at a position blocking the empty bobbin supply path in the free support state and is moved to a position substantially continuous with the empty bobbin supply path due to the weight of the empty bobbin. It is preferred that it is. That is, when the gate is freely supported without any load, the gate automatically comes to a position where the empty bobbin supply path is blocked. When the empty bobbin is placed on the gate, the weight of the empty bobbin moves to a position substantially continuous with the empty bobbin supply path, so that the above-described operation is further ensured.

In the present invention, in order to supply the empty bobbins one by one to the cradle arm, an empty bobbin stopper for stopping a subsequent empty bobbin at a position above the gate of the empty bobbin supply path is rotatable. It is preferably pivoted. In this case, if the empty bobbin stopper has an L-shape, when the empty bobbin stopper is opened and one empty bobbin is sent out, the subsequent empty bobbin is stopped by the L-shaped rear projection. Will be done. In this way, empty bobbins are supplied one by one.
It is preferable that this empty bobbin stopper is also operated by the movement of the cradle arm. That is, it is preferable that the lever is connected to the empty bobbin stopper, and the empty bobbin stopper is operated via the lever by movement of the cradle arm. By doing so, the operation of dispensing the full package and the operation of supplying the empty bobbin are performed in conjunction with the rotation of the cradle arm.

It is preferable that the delivered full package does not collide with the preceding full package so that the yarn layer of the full package is not damaged by the collision. For this reason, in the present invention, the package tray having a length longer than the winding diameter of the package can be swung in the vicinity of the midpoint so that the tip at the package exchange position is lowered when the package stopper is freely supported. It is preferable to support it. By doing so, when the preceding package is placed on the package stopper, the package stopper stops the following package, and the packages are prevented from contacting each other.

Preferably, the empty bobbin supply path is bent near the empty bobbin stopper, and the inclination of the empty bobbin stopper on the upstream side is smaller than the inclination near the gate. Since the empty bobbin supply path is bent near the empty bobbin stopper in this manner, the pressure applied to the empty bobbin stopper by the subsequent empty bobbin is not so high, and the empty bobbin released from the empty bobbin stopper is reliably secured. Can be supplied to the bobbin changing position. Further, as described above, since the empty bobbin supply path is bent near the empty bobbin stopper, the overall machine height of the bobbin changing device according to the present invention can be reduced.

The cradle arm used in the present invention grips the bobbin, winds the yarn as a package on the bobbin at the winding position of the yarn winding device, moves the package to the bobbin replacing position, releases the package, and empties it. There is no particular limitation as long as the bobbin can be gripped, and a conventionally known cradle arm may be used. A so-called one-sided type, in which one cradle arm opens in the axial direction, or a so-called double-sided type, in which both cradle arms open in the axial direction, respectively, may be used. Is more preferred.

The cradle arm is rotatable around a cradle axis so that the winding of the package by the winding device and the movement to the bobbin changing device are facilitated. A cam plate having a curved cam surface curved in a circumferential surface and a concave portion formed at one end of the curved cam surface is attached, and is slidably in contact with the curved cam surface of the cam plate and can be engaged with the concave portion. It is preferable that the projection is provided so as to be movable perpendicular to the cradle axis.

In the winding device, the bobbin is pressed against the drive roller and urged in the reverse direction at the bobbin replacing position. Is connected to the machine frame of the yarn winding device, and a resilient member is stretched between the pivot portion of the two link members and the machine frame. preferable.

Further, it is preferable that the cradle arm includes a rotatable bobbin gripper, and a brake device that brakes the rotation of the bobbin gripper when the cradle arm is moved to the bobbin changing device side.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, a cradle arm 10 of the present invention includes a bobbin B or a bobbin B doffed from a winding position W where a bobbin B or a yarn layer wound on the bobbin B contacts a friction roller F. Between the bobbin exchange position R for supplying the cradle shaft 11
Can be swung around. As will be described later, the cradle arm 10 is swung by a motor 20. Further, while the cradle arm 10 is rotated from the winding position W to the bobbin exchange position R by the above-described structure, the bobbin B chuck portion of the cradle arm 10 is fixed by the external cam 80 fixed to the machine frame and having a predetermined external surface shape. It is designed to open.

The cradle arm 10 has a wall 10a. As shown in FIG. 1, the wall 10a is open at the package tray 30 side and can be engaged with the axial end of the bobbin at the bobbin replacement position R. The wall portion 10a does not contact the bobbin B when the bobbin chuck 14 (FIGS. 5 and 6) of the cradle arm 10 grips the bobbin B, while the bobbin chuck 14 of the cradle arm 10 opens in the axial direction. Extends below both ends in the axial direction of the bobbin B and on the side opposite to the winding position W. With this structure, when the bobbin chuck 14 of the cradle arm 10 is opened in the axial direction, the released bobbin B is supported by the wall 10a.

The package tray 30 is moved from the unwinding position side of the bobbin replacing position R to the package unloading position D.
Are provided downward to the package take-out position D with a gentle inclination.

The package tray 30 supports lower portions of both ends of the bobbin B on which the package P has been wound. When the cradle arm 10 is at the bobbin replacement position R, the wall portion of the cradle arm 10 described above is provided. The lower side of 10a is connected to the front end of the package tray 30 on the bobbin replacement position R side.

As shown in FIG. 1, the package tray 30 is bent upward at the take-out position D of the package P at the tip, so that the package P can be stopped. A guide bar 32 for holding the end surface of the bobbin B is provided at the side of the package tray 30, that is, at an outer position when viewed in the axial direction of the bobbin B, thereby preventing the package P from touching the left and right. .

A package stopper 34 is swingable on the guide bar 32 at a position on the inner side of the bobbin replacement position R by about half the winding diameter of the package P from the tip end of the package tray 30 (package unloading position D). It is supported at a fulcrum 33. The package stopper 34 has an inverted T-shape as shown in FIGS. 1 and 4, and when the fulcrum 33 is supported in a free state, FIG. 4A (ie, a two-dot chain line in FIG. 1). As shown by, the right end is lowered, and the package P can pass to the package take-out position D.

Therefore, the package P which precedes the leading edge of the package tray 30 (package take-out position D).
When there is no package stopper 34, even if the package stopper 34 is present, the package P can penetrate to the re-tip portion (the removal position D of the package P). In this way, the package P invades and mounts on the left side of the package stopper 34, so that the left side of the package stopper 34 is lowered and the right side is raised by the weight of the package P as shown in FIG. Thereby, as shown in FIG. 4C, the subsequent package P is prevented from entering the package take-out position D. Therefore, the length of the package stopper 34 is preferably slightly larger than the maximum winding diameter of the package P.

Referring again to FIG. 1, an empty bobbin supply path 40 extends obliquely upward from the upper side of the above-described bobbin exchange position R on the side opposite to the winding position, and the empty bobbin supply path 40 is bent at the upper part. The inclination angle is gentle (the gentle inclination portion of the empty bobbin supply path is indicated by reference numeral 40a).

A gate 41 is pivotally supported by a pin 43 at the end of the bobbin B supply path on the bobbin exchange position R side. In the free state, the gate 41 is in a substantially horizontal state as shown by a solid line in FIG. 1, and its tip is located above the upper part of the bobbin B on the cradle arm 10 that has reached the bobbin exchange position R. . Therefore, as shown in FIG. 3A, when the gate 41 is in the free state, the bobbin B of the package P is not prevented from entering below the gate 41 at all. The height position of the right end 41a of the gate 41 in this free state is
Is restricted by hitting a gate stopper 42 provided on the machine base.

When the empty bobbin B is placed on the gate 41, the gate 41 swings clockwise around the pin 43 as shown in FIG. 3 (c). Is moved by a compression spring 44 provided on the rear side of the empty bobbin supply path 40. Further, thereafter, the compression spring 44 acts to push the empty bobbin B placed on the gate 41 toward the wall of the cradle arm 10.

In this manner, when the empty bobbin B falls on the gate 41 located at the position shown by the solid line in FIG. 1, if the (full) package P still remains, it becomes empty. Bobbin B is placed on (full) package P,
The empty bobbin B rotates on the winding layer of the (full) package P as the (full) package P moves. On the other hand, when the yarn layer on the winding bobbin provided by the cradle arm 10 is thinner than the thickness of the gate 41, the gate 41 can contact the bobbin end of the winding bobbin. Due to the light weight, the bobbin is discharged before the empty bobbin B arrives, and the gate 41 hardly contacts the bobbin end of the bobbin.

When the full package P is dispensed as shown in FIG. 3B, the gate 41 swings clockwise as shown in FIG. 3C, and thereafter, as described above, By the action of the compression spring 44, the empty bobbin B placed on the gate 41 is pushed toward the wall of the cradle arm 10. The empty bobbin B is sandwiched between the wall 10a of the cradle arm 10 and the gate 41, so to speak, between the palms of the left and right hands. Furthermore, the empty bobbin B is
Is moved to the winding position W, the gate 41 returns to the free state as shown in FIG.

In FIG. 1, an empty bobbin stopper 45 is attached to a swingable fulcrum shaft 46 near the bent position of the empty bobbin supply path 40. Empty bobbin stopper 4
5 has an L-shaped cross section as shown in FIG. 1, and stops the leading empty bobbin B when the right end 45a rises. This empty bobbin stopper 45 is connected to a fulcrum shaft 46.
As a result, the right end 45 a of the empty bobbin stopper 45 is lowered, and the first empty bobbin B is sent out along the empty bobbin supply path 40. At this time, the left end 45b of the L-shaped empty bobbin stopper 45 rises (the state shown by the two-dot chain line in FIG. 1), and the subsequent empty bobbin B is stopped. In this way, the empty bobbins B are reliably sent out one by one.

As described above, the right end of the guide bar 32 provided on the side of the bobbin of the full package P is shown in FIG.
As shown in FIG. 7, the guide 32a extends above the empty bobbin supply path 40 to prevent the empty bobbin B from falling down. Note that the guide bar 32 and the guide 32a may be provided separately.

A support bracket 47 is fixed to the guide bar 32 or the guide 32 a, and a lever 48 is supported by a pin 49 so as to swing around the support bracket 47. The upper end 48a of the lever 48 is pin-connected to the tip of a link 46a integrally attached to the fulcrum shaft 46,
The lever 48 is connected to the empty bobbin stopper 45 via a link 46a and a fulcrum shaft 46.

The lower end of the lever 48 has a cradle arm 1
When the cradle arm 10 swings to the bobbin exchange position R, the knocker 48b is attached to the empty bobbin stopper 45 via the lever 48, the link 46a and the fulcrum shaft 46. 1 is indicated by a dashed line. The lever 48 is urged by a tension spring 50, and when the cradle arm 10 is not in contact with the knocker 48b, the empty bobbin stopper 45 is in the solid line state in FIG.

As described above, the cradle arm 10 used in the present invention holds the bobbin B, winds the yarn as the package P on the bobbin B at the winding position W of the yarn winding device, and transfers the package P to the bobbin. Any material that can be moved to the exchange position R and released and grasp the empty bobbin B may be used.
In particular, the structure is not limited, and a conventionally known, for example, one-sided or two-sided, cradle arm may be used. However, a preferred embodiment of the cradle arm 10 for use in the present invention will now be described.

FIG. 5 is an overall view of the cradle arm 10 used in the embodiment of the present invention. Cradle arm 1
0 can swing around the cradle shaft 11,
It swings between the winding position W and the bobbin replacing position R. At the winding position W, as the winding of the package P formed on the bobbin B increases, the cradle arm 10 causes the bobbin B or the yarn layer on the bobbin B to gradually swing while contacting the friction roller F. Has become. When the package P reaches a predetermined winding amount (full package P in the regular winding state), the package P is moved from the winding position W to the bobbin replacing position R.

The cradle arm 10 shown in FIG.
The cradle arm main body 12 having a U-shaped cross section as shown in the cross-sectional view in FIG. Brackets 12a are provided on both sides of the cradle arm main body 12, and the cradle arm lever 13 is
Are swingably supported.

The tip of the cradle arm body 12 on the side opposite to the cradle shaft 11 has a cylindrical shape, and bobbin chucks 14 are attached to it so as to be movable in the axial direction of the bobbin B, respectively. That is, the shaft 13b is provided orthogonal to the tip of the cradle arm lever 13, and this shaft 1
A bobbin chuck 14 is rotatably supported by a bearing 15 at 3b. The bobbin chuck 14 has a conical shape with a smaller diameter toward the inner end, and the conical surface 14a protrudes into the hollow end surface of the bobbin B to grip the bobbin B.

The end of the cradle arm lever 13 opposite to the cradle shaft 11 has a shaft 13 of the bobbin chuck 14.
b, the cradle arm lever 13 swings around the pin 12b, and the bobbin chuck 1
4 moves in the axial direction of the bobbin B to open and close. As shown in FIG. 6, a compression spring 1 is provided at the end of the cradle arm lever 13 on the cradle shaft 11 side.
The tip of the cradle arm lever 13 is normally urged by the compression spring 16 in the closing direction. Also, cradle arm lever 1
As shown in FIG. 5B, the tip 13a of the cradle shaft 3 slightly projects from the cradle shaft 11, and the projected tip 13a slides on the outer cam 80 attached to the machine base. Thus, the above-described compression spring 1
The cradle arm lever 13 is swung around the pin 12b against the urging force of No. 6 so that the bobbin chuck 14 moves in the direction in which the bobbin B opens. The outer cam 80 is provided on the machine frame of the winding machine at the bobbin replacement position R.

In FIG. 7, a cam plate 17 is mounted near the cradle shaft 11 of the cradle arm body 12. The cam plate 17 has a curved cam surface 17a curved substantially in a circular shape around the cradle shaft 11 and a concave portion 17b formed at one end of the curved cam surface 17a.
(See FIG. 7).

A motor 20 for moving the projection 18 which can be engaged with the recess 17b of the cam plate 17 back and forth is pivotally supported by a pin 19 on the machine frame of the winding machine. The motor 20 may be a combination of a screw or the like that converts the rotational motion of the motor 20 into a linear motion, or may be moved back and forth by a hydraulic motor. As described above, the motor 20 is supported by the pins 19 so as to be able to swing with respect to the machine frame, and the spring 21 is stretched between the housing of the motor 20 and the machine frame. When pressed by the curved cam surface 17a of the cam plate 17 and reaches the concave portion 17b, it fits into the concave portion 17b. The bracket attached to the housing of the motor 20 is provided with limit switches 22a and 22b for controlling the movement position of the protrusion 18 by the motor 20. Note that other appropriate detection means can be used instead of the limit switch.

With this configuration, when the cradle arm 10 is at the winding position W, the projection 18 is out of the recess 17b, and the projection 18 is in sliding contact with the curved cam surface 17a of the cam plate 17, and the curved cam surface 17a The bobbin B at the winding position W is pressed against the friction roller F by a predetermined contact pressure due to the spring force acting on the bobbin B and the weight of the cam plate 17 and the bobbin B. As the winding becomes thicker, the protrusion 18 moves on the periphery of the cam surface, and when the package on the bobbin B reaches a predetermined winding amount, the motor 20 is driven to move the protrusion 18 forward. Cam plate 17
Of the cradle arm 10 from the winding position W to the bobbin replacing position R by sliding into the concave portion 17b while sliding along the curved cam surface 17a. Can be turned around.

In the present invention, during the rotation, the cradle arm 10 is mounted on the package P of the bobbin B.
Stops slightly away from the friction roller F. This is because one of the limit switches 22
The position of the projection 18 is controlled by a.

Further, according to the present invention, the bobbin B at the winding position W is urged against the friction roller F with a predetermined pressing force, and the friction roller F is moved to the cradle arm 10 moved to the bobbin replacing position R. A mechanism for preventing the urging force in the F direction from acting is provided. That is, in FIGS. 6 and 8, the first link 25 is
Is pivoted by The position of the pin 24 is a position away from the axis of the cradle shaft 11 by a predetermined distance. A second link 26 is pivotally supported on the machine frame by a pin 27, and the second link 26 is connected to the first link 25 by a pin 28. A tension spring 29 is stretched between the pin 28 and the machine frame. Because of this structure,
When the cradle arm 10 is at the winding position W as shown in FIG. 8, the first and second links and the cradle arm 10 are in the state of the solid line in FIG. All pressing forces are applied. On the other hand, the cradle arm 10 is swung around the cradle shaft 11,
When the pivot 24 of the first pin to the cradle arm 10 swings to the position shown by the two-dot chain line in FIG.
The connection state of the links 25 and 26 is bent in the opposite direction to the above-described case, so that the urging force acting on the cradle arm 10 by the tension spring 29 is in the opposite direction as described above. Therefore, the cradle arm 10 is not urged toward the friction roller, but is urged toward the bobbin B winding position W. Further, in the cradle arm 10 of the present embodiment, the brake is applied to the bobbin chuck 14 while the cradle arm 10 is moved from the winding position W to the bobbin replacing position R, so that the bobbin B is not rotated during the doffing operation. To prevent the end yarn from winding around the winder.

That is, as shown in FIG. 9, a brake shoe 65 is provided in the bobbin chuck 14 so as to be swingable around a pin 66, and the force of a tension spring 67 is applied to the other end of the brake shoe 65. In a steady state, the brake shoe 65 slides on the inner surface of the drum 68 to apply a brake. An L-shaped lever 70 is pivotally supported around a pin 69 so as to be swingable, and connects the L-shaped lever 70 and the other end of the brake shoe 65. By pushing the L-shaped lever 70 in the direction of arrow a, the brake shoe 65 is disengaged from the drum 68 and the bobbin chuck 1
4 freely rotates (see FIG. 9A).

Further, as shown in FIG. 5 (a), a brake lever 60 is pivotally supported by a pin 61 on the cradle arm body 12 near the cradle arm lever 13 described above.
2, a tension spring 63 is stretched.

When the cradle arm 10 reaches the vicinity of the bobbin replacement position R, the tip of the brake lever 60 contacts the cam 62 provided on the machine frame, and the brake lever 60
The engagement with the L-shaped lever 70 is released (see FIG. 9C), whereby the brake of the bobbin chuck 14 is operated.

At the winding position W, the brake shoe 65 is released by the L-shaped lever 70 being pressed by the brake lever 60 as shown in FIG.
4 free rotations are allowed. As shown in FIG. 9C, when the cradle arm 10 reaches the bobbin replacement position R, the tip of the brake lever 60 contacts the cam 62,
The rear end of the L-shaped lever 70 becomes free and the bobbin chuck 14 is braked.

The operation of the apparatus of the present invention having the above-described structure will be described below.
This will be described below with reference to the sequence diagram of FIG. In the steady winding state, the bobbin B is gripped between the bobbin chucks 14 of the pair of cradle arms 10, and the bobbin B is pressed against the friction roller F, and the yarn is moved to the friction roller F by a traverse device (not shown). The yarn is wound on the bobbin B as a package P.

That is, as described above with reference to FIG. 7, when the cradle arm 10 is at the winding position W, the projection 18 is out of the recess 17b and the projection 1
8 is in sliding contact with the curved cam surface 17a of the cam plate 17, and as described above with reference to FIG.
9, the bobbin B at the winding position W is pressed against the friction roller F by a predetermined contact pressure due to the spring force acting on the cradle arm 10 and the weight of the bobbin B.
A predetermined contact pressure is applied to the bobbin B gripped by the cradle arm 10, and the package P is formed on the bobbin B into a predetermined shape.
Is wound up. The projection 18 moves on the circumference of the curved cam surface 17a as the winding thickness increases.

When the package on the bobbin B reaches a predetermined winding amount (time t ₁ ), the motor 20 shown in FIG. 7 is driven to move the projection 18 forward. Thereby, the protrusion 18
Is inserted into the concave portion 17b while sliding along the curved cam surface 17a of the cam plate 17, and the cradle arm 10 is slightly lifted from the winding position W by pushing the concave portion 17b to further advance the projection portion 18. , The package P continues to be separated from the friction roller F.

During the following doffing operation, the package P
Is rotating, to make the doffing operation uncertain,
In this state, the rotation of the package P is stopped. That is,
As described above with reference to FIG.
The tip of the brake lever 60 provided on the machine abuts on the cam 62 provided on the machine frame, thereby operating the brake of the bobbin chuck 14 (time t ₂ ).

With the package P separated from the friction roller F, the motor 20 is temporarily stopped (at time t).
₃ ). At a predetermined time (10 seconds in this embodiment) from this stop state, the motor 20 is started again (time t ₄ ) so that the rotation of the package P is completely stopped, and the cradle arm 10 is moved to the bobbin replacement position. Move toward R.

When the cradle arm 10 is in the bobbin exchange position R
As described above with reference to FIGS. 5 and 6, the bobbin chuck 1 of the cradle arm 10
4 is started to open in the axial direction, the bobbin B of the full package P at the bobbin exchanging position R is removed from the cradle arm 10 by the outer surface cam 80 (t _6). When both ends of the bobbin B of the package P come off from the cradle arm 10 in this way, as shown in FIG.
The bobbin B is placed on the wall 10a of the cradle arm 10 and slowly rolls from this state toward the package tray 30 as shown in FIG. 3B.

As described above with reference to FIGS. 1 and 4, the package P rolled on the package
Is stopped by the package stopper 34 when there is a preceding package P, and collision with the preceding package P is prevented. If there is no preceding package P, the package P rolls to the foremost position (package P take-out position D), stops, and waits for the manual or doffer to take out the package P.

Note that the cradle arm 10
During the movement of the gate 41 to the bobbin replacement position R, the right end of the gate 41 is slightly smaller than the bobbin B of the package P because the gate 41 is freely supported by the pin 43 as described above with reference to FIG. Is on. Therefore, the gate 41 does not hinder the full package P from entering.

Immediately before the cradle is completely moved to the bobbin exchange position R (time t ₅ ), the cradle arm 10 hits the knocker 48 b at the tip of the lever 48 as described above with reference to FIG. Lever 48 is fulcrum 4
9, whereby the empty bobbin stopper 45 is opened. The empty bobbin stopper 45 is rotated, and the foremost empty bobbin B on the empty bobbin supply path 40 is sent out along the empty bobbin supply path 40. Since the succeeding empty bobbin B is stopped by the claw on the rear side of the empty bobbin stopper 45, only one empty bobbin is reliably sent out.

The empty bobbin B coming off the empty bobbin stopper 45 falls toward the gate 41 along the empty bobbin supply path 40, and if the package P at the bobbin replacement position R has been paid out during this time. Immediately, if the package P has not been paid out yet, the empty bobbin B is lightly placed on the full package P, and the full package P is discharged and the empty bobbin B is put in the empty bobbin supply path 40. Reaches the position of the gate 41 (time t ₇ ), hits the gate 41 and swings the gate 41 clockwise around the pin 43.

Accordingly, as described above with reference to FIG. 1, the empty bobbin B is held between the gate 41 and the wall 10a of the cradle arm 10, so to speak, between the right and left palms. . In this state, the cradle arm 10 starts retreating toward the winding position W (t ₈ ).

When the cradle arm 10 moves in the axial direction (time t ₉ ), the empty bobbin B is gripped between the bobbin chucks 14. Also, with the empty bobbin B held, the cradle arm 10 is moved toward the winding position W, and the empty bobbin B is removed from the bobbin exchange position, so that the gate 41 is in the steady position (the position indicated by the solid line in FIG. 1). Return to When the cradle arm 10 is moved toward the winding position W, the cradle arm 10 and the lever 48 are moved.
The contact with the knocker 48b at the tip of the
Swings together with the fulcrum shaft 46, whereby the empty bobbin stopper 45 returns to the state in which the empty bobbin on the empty bobbin supply path 40 is stopped (the state shown by the solid line in FIG. 1).

Further, the cradle arm 10 is moved to the winding position W
While moving (time t ₁₀ ), the cradle arm 1
The leading end of the brake lever 60 provided at 0 is disengaged from the cam 62 provided at the machine frame, thereby releasing the brake of the bobbin chuck 14.

When the cradle arm 10 further rotates and moves to the winding position W, the empty bobbin B is pressed against the friction roller F, and the winding of the yarn onto the bobbin B on the cradle arm 10 is started. You.

[0065]

According to the present invention, it is possible to eliminate the complexity of the equipment and to automatically doff a fully-loaded bobbin and mount an empty bobbin automatically instead of a device effective only when operated by a human. And a bobbin exchange device for a yarn winding device capable of performing the following.

[Brief description of the drawings]

FIG. 1 is a front view of a bobbin B changing device of a yarn winding device according to the present invention.

FIG. 2 is a plan view of an arrow II portion of FIG.

FIG. 3 is a diagram showing steps of releasing a full bobbin and gripping an empty bobbin in chronological order from (a) to (d).

FIG. 4 is a view showing an operation state of a stopper of a full bobbin.

5A and 5B show a cradle arm used in the present embodiment, wherein FIG. 5A is a front view and FIG. 5B is a side view.

FIG. 6 is a sectional view of a main part of the cradle arm shown in FIG. 5;

7 is a schematic front view (a view taken in the direction of arrows VII-VII in FIG. 6) showing a rotation mechanism of the cradle arm shown in FIG. 5;

8 is a schematic front view (a view taken in the direction of arrows VIII-VIII in FIG. 6) showing the structure of the urging force of the cradle arm shown in FIG.

FIG. 9 is a front view showing various operation states of a brake of the bobbin chuck used in the embodiment.

FIG. 10 is a sequence diagram showing the operation of one embodiment of the present invention.

FIG. 11 is a schematic perspective view of a main part of the bobbin changing device according to the present invention.

[Description of Signs] 10 Cradle arm 30 Package tray 40 Empty bobbin supply path 41 Gate B Bobbin P Package R Bobbin replacement position W Winding position

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[Procedure amendment]

[Submission date] March 25, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 10

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

Therefore, the package P which precedes the leading edge of the package tray 30 (package take-out position D).
If not, even if the package stopper 34, the package P can penetrate to the lowest tip (take-out position D of the package P). In this way, the package P invades and mounts on the left side of the package stopper 34, so that the left side of the package stopper 34 is lowered and the right side is raised by the weight of the package P as shown in FIG. Thereby, as shown in FIG. 4C, the subsequent package P is prevented from entering the package take-out position D. Therefore, the length of the package stopper 34 is preferably slightly larger than the maximum winding diameter of the package P.

Claims (10)

[Claims] 1. A bobbin is gripped, a yarn is wound on a bobbin as a package at a winding position of a yarn winding device, the package is moved to a bobbin replacing position, released, and an empty bobbin is gripped. Cradle arm, a package tray extending from the vicinity of the bobbin replacement position to the non-winding position side to receive a package, and an empty space extending upward from the non-winding position near the bobbin replacement position and supplying an empty bobbin. A bobbin supply path, wherein the cradle arm has a wall portion that is open on the package tray side at the bobbin exchange position and is engageable with an axial end of the bobbin; A gate is pivotally supported at the tip of the replacement position so as to be rotatable between a position blocking the empty bobbin supply path and a position substantially continuous with the empty bobbin supply path. A bobbin exchange device for a yarn winding device. 2. The apparatus according to claim 1, wherein the gate is in a position where the gate is in a free support state and blocks the empty bobbin supply path, and is moved to a position substantially continuous with the empty bobbin supply path by the weight of the empty bobbin. Item 2. A bobbin changing device according to Item 1. 3. An empty bobbin stopper for stopping a subsequent empty bobbin at a position above the gate in the empty bobbin supply path, and is rotatably supported.
Or the bobbin exchange device according to 2. 4. The bobbin changing device according to claim 3, wherein the empty bobbin stopper has an L-shape. 5. The apparatus according to claim 1, wherein a lever is connected to the empty bobbin stopper, and the empty bobbin stopper is actuated through the lever by movement of the cradle arm. The bobbin changing device according to 2, 3, or 4. 6. The empty bobbin supply path is bent in the vicinity of the empty bobbin stopper, and the inclination of the empty bobbin stopper on the upstream side is smaller than the inclination in the vicinity of the gate. 6. The bobbin exchange device according to 5. 7. The package tray has a package stopper having a length longer than the winding diameter of the package, and the package stopper swings near the middle point so that the tip of the package exchange position is lowered when freely supported. 7. The device according to claim 1, which is movably supported.
The bobbin exchanging device according to any one of the above. 8. The cradle arm is rotatable about a cradle axis. The cradle arm has a curved cam surface curved substantially in a circular shape around the cradle axis and one end of the curved cam surface. A cam plate having a recess formed in the portion is attached, and a projection that is slidably in contact with the curved cam surface of the cam plate and engageable with the recess is provided movably perpendicular to the cradle axis. The bobbin changing device according to claim 1, wherein 9. A portion of the cradle arm, which is located at a predetermined distance from the cradle shaft, and a machine frame of the yarn winding device are connected by two link members pivotally supported so as to be mutually bendable. The bobbin changing device according to claim 8, wherein an elastic member is stretched between the pivot portion and the machine frame of the two link members. 10. The cradle arm includes a rotatable bobbin gripper, and a brake device that brakes the rotation of the bobbin gripper when the cradle arm is moved toward the bobbin changing device. The bobbin changing device according to any one of claims 1 to 10, wherein