JPH0657558A - Device for exchanging roving of fine spinning frame - Google Patents

Abstract

PURPOSE:To eliminate motion different from one during a stationary operation at a bobbin changing arm side without requiring enlargement in size of a roving exchanging device and rise in height of a preliminarily roving winding rail when a slightly wound bobbin is delivered between a bobbin gripping device and the bobbin changing arm. CONSTITUTION:A bobbin gripping device 26 for temporarily holding a pair of slightly wound bobbins removed from a creel at the beginning of a roving exchanging operation until completion of the roving exchanging operation is attached to the rear part, in the advance direction during roving changing operation, of a roving changing machine 12. The bobbin gripping device 26 is arranged on a holding arm 37 and rotated and arranged together with the holding arm 37 at a bobbin delivery position and a waiting position by operation of an air cylinder 39. The bobbin gripping device 26 and the holding arm 37 together with a supporting plate 34 are raised and lowered by a rise and fall mechanism by a stroke larger than the length of a peg to which a slightly wound bobbin is stuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roving exchange device for a spinning machine, and more specifically, for moving along a longitudinal direction of a machine frame of the spinning machine,
A pair of front and rear roving bobbins that are hung on the bobbin hangers in the front and rear rows of the creel (hereinafter referred to as small ball bobbins), and spares that are hung on the bobbin hangers of the bobbin carrier that has been carried into the spare roving winding rail. The present invention relates to a roving yarn exchange device for exchanging a roving yarn winding (full bobbin) with a bobbin exchange arm that moves up and down and moves back and forth.

[0002]

2. Description of the Related Art This type of roving yarn exchanging device has a structure in which a small bobbin taken out from a creel is suspended from a bobbin hanger from which a preliminary roving winding is removed. Therefore, a spare bobbin hanger for suspending the small bobbin taken out first, that is, the small bobbin taken out before removing the preliminary roving bobbin is required. At the end of the roving exchange operation, the bobbin carrier has an empty bobbin hanger from which the preliminary roving winding is finally removed.

The bobbin carrier in which the small bobbin is suspended is
After the residual roving of the small bobbin is processed to make the small bobbin an empty bobbin, it is carried into the roving process. Then, the empty bobbin and the full bobbin are exchanged by the pipe changer in the roving process. A spare bobbin hanger is not required at the time of pipe changing work by the pipe changing machine in the roving process, and a full bobbin is hung on the bobbin hanger on which an empty bobbin was hung. However, when the empty bobbin and the full bobbin are simply exchanged, if the bobbin carrier is carried into the spare roving winding rail, the position of the spare bobbin hanger does not become the position at which the small bobbin taken out first is suspended. Therefore, in order to prevent inconvenience in the spinning process, it is necessary to move the bobbin carrier at the time of changing pipes in the roving process so as to shift the hanging position of the full bobbin from the hanging position of the empty bobbin.

Further, in the case of a spinning machine having a large number of spindles, a single roving machine requires a larger number of preliminary roving spools than the number of full bobbins to be fried at one time. It is necessary to carry in. At that time, if there is a spare bobbin hanger on the bobbin carrier, it will hinder the roving exchange between the small bobbin hung on the creel of the spinning machine and the full bobbin position hung on the bobbin carrier. The problem is that it's hard not to.

A roving (shino) exchanging device for solving the above-mentioned problems is disclosed in JP-A-62-223328 and JP-A-2-12.
It is proposed in Japanese Patent No. 7530. In each of these devices, the small bobbin that was first taken out during the roving exchange operation was held until all the preliminary roving rolls were removed from the bobbin carrier, and the last removed roving roll was suspended. The bobbin hanger is equipped with a device that suspends the small bobbin.

[0006]

Problems to be Solved by the Invention JP-A-62-1233
In the device proposed in Japanese Patent No. 28, the bobbin gripping device that holds the small ball bobbin until all the preliminary roving spools are removed from the bobbin carrier moves in the front-rear direction (direction orthogonal to the longitudinal direction of the spinning machine base). The bobbin holding arm is movable to the standby position and the corresponding bobbin holding / releasing position above the peg of the bobbin exchanging arm. However, in the configuration in which the bobbin holding device is moved and arranged to the standby position and the bobbin holding open position by the forward and backward movement, in order to prevent the bobbin holding device and its forward / backward moving mechanism from interfering with the bobbin exchange arm, There is a problem in that the width (the length in the direction orthogonal to the longitudinal direction of the spinning frame) becomes large.

Further, in the device proposed in Japanese Patent Laid-Open No. 2-127530, the bobbin gripping device is arranged to move between a standby position and a bobbin gripping open position by rotating in the horizontal direction. There is no need to increase the width of.
However, in this device, when the small bobbin is pulled out from the peg of the bobbin exchanging arm, or when the small bobbin is mounted on the peg, the bobbin exchanging arm must be moved up and down. This elevating position is below the steady elevating position of the bobbin exchanging arm during the roving change operation. That is, it is necessary to increase the vertical stroke of the bobbin changing arm. Therefore, when the heights of the preliminary roving winding rails are the same, it is necessary to secure a moving space for the bobbin changing arm below the roving changing device. However, it is difficult to secure a space in the lower part of the roving thread changing device, and it is necessary to move the steady elevating position upward. As a result, the roving changer becomes larger and
There is a problem that the height of the creel and the preliminary roving winding rail of the spinning machine must be increased. Further, when the small bobbin is exchanged between the bobbin gripping device and the bobbin exchanging arm, the bobbin exchanging arm needs to perform a rotating operation different from the normal operation in addition to the ascending / descending operation. Moreover, when the bobbin picked up from the creel is transferred to the bobbin gripping device at the beginning of the roving change operation, the bobbin exchanging arm moves the small ball bobbin from the bobbin gripping device to the bobbin holding device after removing all the preliminary roving bobbins. There is a problem that the control becomes complicated unlike when receiving the bobbin.

The present invention has been made in view of the above problems, and its purpose is not to increase the size of the roving yarn exchanging device and to increase the height of the creel and the spare roving winding rail, and further, to achieve the bobbin. It is to provide a roving thread changing device for a spinning machine that does not require control to cause the bobbin changing arm to perform an operation different from that during a steady work when the small bobbin is transferred between the gripping device and the bobbin changing arm. .

[0009]

In order to achieve the above-mentioned object, in the present invention, the spinning machine is moved along the machine base longitudinal direction,
By moving the bobbin exchanging arm up and down and moving back and forth, the bobbin after the pair of front and rear roving threads suspended on the two rows of bobbin hangers on the front and rear of the creel and the spare roving thread suspended on the spare roving winding rail are exchanged. A bobbin gripping device for temporarily holding the pair of bobbins removed from the creel at the beginning of the roving thread replacement work until the end of the roving thread replacement work, wherein the bobbin gripping device is replaced with the bobbin replacement device. When the arm is arranged at a predetermined position in a series of operations, the rotation is made to rotate horizontally between the bobbin transfer position facing the peg of the bobbin exchange arm and the standby position that does not hinder the movement of the bobbin exchange arm. A moving mechanism and an elevating mechanism for moving the bobbin holding device and the rotating mechanism to a position where the bottom surface of the bobbin attached to the peg is above the tip of the peg are provided.

[0010]

Function: The number of spare roving rolls required for exchanging roving yarns is hung on the spare roving roll rail. In this state, the roving yarn exchange device moves along the spinning machine stand to perform the roving yarn exchange work. When the bobbin exchanging arm first takes out the small bobbin from the creel and arranges it at a predetermined position, the bobbin holding device is arranged from the standby position to the bobbin transfer position by the operation of the rotating mechanism. After the bobbin gripping device grips the small bobbin, the elevating mechanism and the rotating mechanism are operated, and the bobbin gripping device pulls the small bobbin from the peg of the bobbin exchanging arm and then is placed in the standby position. Next, the preliminary roving bobbin is removed from the preliminary roving bobbin rail, and is suspended at the position where the small bobbin was suspended. Hereinafter, the roving thread exchange operation of suspending the small bobbin taken out from the creel at the position where the preliminary roving spool is removed and suspending the preliminary roving spool at the creel position where the small boss is removed is sequentially performed. After the last preliminary roving bobbin is removed from the preliminary roving bobbin rail, the small bobbin previously held by the bobbin holding device is transferred to the peg of the bobbin changing arm. Then, the small bobbin is suspended at the position where the last preliminary roving winding is removed by the raising / lowering operation of the bobbin exchange arm.

[0011]

EXAMPLES In the following, the present invention not only replaces the small bobbin of the spinning machine with the preliminary roving spool, but also performs the roving joining operation between the roving of the small bobbin being spun and the roving of the preliminary roving. An embodiment of a roving changer will be described with reference to the drawings.

As shown in FIG. 3, in the creel 1 of the spinning machine, two rows of inner and outer roving winding rails 2 and 3 are provided on both the left and right sides (only one side is shown) of the machine stand in the machine longitudinal direction (direction perpendicular to the plane of the drawing). ) Is arranged in parallel with. A support rail 4 is arranged between the roving winding rails 2 and 3 in parallel with the machine longitudinal direction. The roving winding rails 2 and 3 are each equipped with bobbin hangers 5 at a predetermined interval which is twice the spindle pitch, and the roving drawn from the roving winding suspended from the bobbin hangers 5 is supplied to the draft part 7 via the roving guide 6. It is supposed to be done. A support bracket 8 extends outwardly from the creel 1, and a conveying rail 9 as a preliminary roving winding rail is provided at the tip end thereof in parallel with the roving winding rails 2 and 3. A bobbin carrier 10 is movably supported on the carrier rail 9, and the bobbin carrier 10 is equipped with a bobbin hanger 11. The spare roving spool (full bobbin F) is suspended on the bobbin hanger 11 to form a spare roving winding train.

On the other hand, the roving changer 12 for moving the roving by moving along the spinning machine base is, for example, the device disclosed in Japanese Patent Application Laid-Open No. 2-127368 previously proposed by the applicant of the present application. A similar roving splicing device (not shown) is provided. The roving splicing device performs the roving splicing work between the roving yarn of the small bobbin being spun suspended on the creel 1 and the roving yarn of the preliminary roving winding before the roving yarn bobbin replacement work by the roving yarn exchanging device. To do. The roving yarn changing device is arranged at the rear of the roving yarn changing machine 12 in the traveling direction during the roving yarn changing operation.

The roving changing device is a small bobbin transfer device 13,
It is composed of a full bobbin transfer device 14 and a bobbin holding device 15. The small bobbin transfer device 13 and the full bobbin transfer device 14 have substantially the same structure as the device disclosed in Japanese Patent Application Laid-Open No. 2-127368. As shown in FIGS. 3 and 4, etc., the small bobbin transfer device 13 is provided with a pair of bobbin exchange arms 16 and 17 composed of a link mechanism, and support plates 20 and 21 having pegs 18 and 19 at their tips. Is equipped with. Then, rotation of the bobbin exchange arms 16 and 17,
The small bobbin E is transferred between the bobbin hanger 5 of the roving winding rails 2 and 3 and the bobbin hanger 11 of the bobbin transporter 10 by back-and-forth movement and vertical movement. Further, the full bobbin transfer device 14 is also configured in substantially the same manner as the small bobbin transfer device 13, is equipped with a pair of bobbin exchange arms (not shown) composed of a link mechanism, and has pegs 22, 23 at the tip thereof.
The support plates 24 and 25 having And
By rotating, moving back and forth, and moving up and down the bobbin exchange arm, the bobbin hanger 11 of the bobbin carrier 10 and the roving winding rail 2,
Preliminary roving winding (full bobbin) F with bobbin hanger 5 of 3
Is being reprinted.

As shown in FIGS. 4 and 5, the bobbin holding device 15 is arranged on the center side of the spinning machine base at the rear of the roving changer 12 in the traveling direction during the roving change operation. Bobbin holding device 15
Is a bobbin holding device 26 for holding a pair of small bobbins E.
And a rotating mechanism 27 for rotating the bobbin holding device 26 in the horizontal direction, and an elevating mechanism 28 for raising and lowering the bobbin holding device 26 and the rotating mechanism 27.

Air cylinder 29 which constitutes the lifting mechanism 28
Are fixed to the frame of the roving changer 12 in a state of extending in the vertical direction via a bracket 30. Above the air cylinder 29, a ball spline is arranged inside the housing 31 so as to extend vertically. The lower end of the ball spline shaft 32 is connected to the tip of the piston rod 29a via a universal joint 33. A support plate 34 is horizontally fixed to the upper end of the ball spline shaft 32. Then, the ball spline shaft 32 is moved in the vertical direction by the operation of the air cylinder 29, and the support plate 3
4 is moved up and down without rotating. The stroke of the piston rod 29a is larger than the length inserted into the pegs 18 and 19 of the small bobbin E. The air cylinder 29 is provided with a proximity switch (not shown) that detects that the piston rod 29a is located at the projecting position and the retracted position.

On the upper surface of the support plate 34, a rotating mechanism 27 is provided.
Is provided. The support column 35 that constitutes the rotating mechanism 27 is erected on the upper surface of the support plate 34 on the side of the spinning machine stand, and a cylindrical support member 36 is rotatably supported on the support column 35. A support arm 37, which is substantially L-shaped in plan view, is fixed to the upper end of the support member 36 so as to be integrally rotatable in a horizontal state. A flange portion 36a is formed at the lower end of the support member 36. A support pin 38 is provided upright on the upper surface of the support plate 34 on the side opposite to the spinning machine base. A support pin 38 rotatably supports a base end of an air cylinder 39 that is horizontally arranged in a state substantially orthogonal to the traveling direction of the roving changer 12. The tip of the piston rod 39a of the air cylinder 39 is rotatably connected to the flange portion 36a via a pin 40. When the piston rod 39a is placed in the retracted position, the support arm 37 is placed in the bobbin transfer position shown in FIGS.
When the support arm 37 is placed in the projecting position as shown in FIGS.
It is arranged at the standby position indicated by 0. The air cylinder 39 is provided with a proximity switch (not shown) that detects that the piston rod 39a is located at the projecting position or the retracted position.

As shown in FIGS. 1 and 2, the bobbin gripping device 26 is disposed on the support arm 37 and is arranged at the same pitch as the pitch of the bobbin hangers 11 suspended on the bobbin carrier 10. The gripping mechanisms 41 and 42 are provided. The gripping mechanisms 41, 42 are provided with a pair of support columns 43, 44 standing on the support arm 37 at predetermined intervals.
The support members 45, 46, 47, and 48 are rotatably supported by 44. A gear 45 is provided below the support members 45 and 46.
a, 46a has a gear 47 at the bottom of the support members 47, 48.
a and 48a are integrally formed in a state in which they mesh with each other.

Supporting pieces 45b and 48b projecting in the horizontal direction are integrally formed at the centers of the supporting members 45 and 48. An air cylinder 49 is connected between the support pieces 45b and 48b so as to extend parallel to the longitudinal direction of the support arm. That is, the piston rod 49a of the air cylinder 49 is rotatably pin-connected to the support piece 45b, and the base end of the air cylinder 49 is rotatably pin-connected to the support piece 48b. Then, when the piston rod 49a is moved to the projecting position and the retracted position, the supporting member 45,
48 are rotated in opposite directions, and gears 45a,
46a and gears 47a, 48a through support members 46, 4
7 is rotated together with the support members 45 and 48. The air cylinder 49 is provided with a proximity switch (not shown) that detects that the piston rod 49a is located at the projecting position and the retracted position.

At the center of the support members 46 and 47, a regulating piece 5 is provided.
0 and 51 are integrally formed so as to project in the horizontal direction. The restriction pieces 50 and 51 are formed so as to extend parallel to the support pieces 45b and 48b when the piston rod 49a is arranged at the protruding position. The restricting pieces 50, 51 have support members 46, 4 on the sides corresponding to the supporting pieces 45b, 48b.
Locking portions 50a and 51a are formed which engage with the support pieces 45b and 48b when the device 7 rotates by a predetermined amount. And
When the piston rod 49a is placed in the retracted position,
The stroke of the piston rod 49a is set so that the locking portions 50a and 51a engage with the support pieces 45b and 48b.

Support members 45, 46 and support members 47, 4
A support bracket 52 made of a leaf spring is fixed to the front side of 8, and a holding member 53 is fixed to the tip of the support bracket 52 with a screw 54. A rubber anti-slip member 55 is fixed to the inside of the grip member 53. Then, in a state where the piston rod 49a is arranged in the projecting position, the gripping member 53 is arranged in the bobbin gripping position as shown by a solid line in FIG. 1, and in a state where the piston rod 49a is arranged in the retracted position, FIG. As shown by the chain line, the gripping member 53 is arranged at the bobbin open position.
The length of the support bracket 52 is such that when the gripping member 53 is arranged at the bobbin gripping position with the support arm 37 arranged at the bobbin transfer position shown in FIG. 1, the center of the gripping member 53 is the bobbin hanger of the bobbin carrier 10. 11 is set so as to face the position.

Next, the operation of the apparatus configured as described above will be described. In the spinning machine, spinning is started in a state in which every other set of roving reels 2 and 3 along the longitudinal direction are hung with a medium ball roving reel M and a full bobbin F suspended. Then, when the medium ball roving spool M becomes the small bobbin E which is almost empty and the full bobbin F becomes the middle ball roving M, the roving change is performed. When it is time to change the roving yarn, the roving yarn changing machine 12 intermittently moves from one end of the spinning machine stand to start the roving yarn changing operation. The roving changer 12 stops at the first working position, and at the same position, the bobbin carrier 1
The roving thread end of the full bobbin F suspended at 0 is fed out. After that, it moves to the next work position, and the roving end spouted at the previous work position is roving-joined to the roving yarn of the pair of small bobbins E being spun. The small bobbin E is moved to the bobbin hanger 11 of the bobbin carrier 10, and the full bobbin F being spun by roving is spun on the creel 1.
Perform the roving exchange work to transfer to the bobbin hanger 5 of.

As shown in FIGS. 4 and 8, the bobbin holding device 26 is always arranged at a standby position where it does not hinder the movement of the bobbin changing arms 16 and 17. In the first cycle of the roving changing operation, the small bobbin transfer device 13 is operated to take out the pair of small bobbins E from the creel 1 (state shown in FIG. 4). Next, bobbin replacement arm 16,1
The small bobbin E mounted on the pegs 18 and 19 of 7 is arranged so as to face the transport rail 9 (state of FIG. 5).
In the second and subsequent cycles, the small bobbin E is suspended from the bobbin hanger 11 of the bobbin carrier 10 by moving up and down the bobbin changing arms 16 and 17 from this state.

However, in the first cycle, the air cylinder 39 is operated in this state, and the piston rod 39a is arranged from the protruding position to the retracted position. Then, the support arm 37 is rotated clockwise in FIGS. 4 and 8 to be placed at the bobbin transfer position in FIG. Next, the air cylinder 49 is operated and the piston rod 49 is arranged at the protruding position. When the piston rod 49a is arranged at the projecting position, the support member 45 is rotated clockwise around the support column 43 in FIG. 1, and the support member 46 is rotated counterclockwise through the gears 45a and 46a. . In addition, the support member 48 is centered around the support column 44 in FIG.
Is rotated counterclockwise, and the support member 47 is rotated clockwise through the gears 48a and 47a. As a result, the gripping member 53 is arranged at the gripping position shown by the solid line in FIG. 9, and the small bobbin E mounted on the bobbin exchanging arms 16 and 17 is gripped by the bobbin gripping device 26.

The gears 45a and 46a and the gear 47a,
When the rotation resistance of 48a is different and, for example, the support member 45 is rotated first, the gripping member 53 fixed to the support members 45 and 46 comes into contact with the small bobbin E during the protrusion operation of the piston rod 49a. The rotation is stopped. When the projecting operation of the piston rod 49a is further continued, the support member 48 is rotated together with the support member 47. And
The operation of the piston rod 49a is stopped in a state where the gripping member 53 fixed to the support members 47 and 48 is in contact with the small bobbin E.

Next, the air cylinder 29 is operated and the piston rod 29a is projected, and the bobbin holding device 26 is arranged in the raised position together with the support plate 34. As a result, the small bobbin E is pulled out from the pegs 18 and 19. Next, the air cylinder 39 is operated and the piston rod 39a is arranged at the protruding position. Piston rod 39a
9 is rotated counterclockwise in FIG. 9, and the bobbin holding device 26 returns to the standby position together with the support arm 37 while holding the small bobbin E (state of FIG. 10).

Next, the full bobbin transfer device 14 is operated, and the full bobbin F after the completion of the roving joining is suspended on the bobbin hanger 5 after the small bobbin E is removed. Next, roving changer 12
Moves along the spinning machine base for a predetermined distance and stops at the next roving changing work position. At that position, the small bobbin transfer device 13
After the small bobbin E is taken out from the creel 1, the small bobbin transfer device 13 moves up and down to suspend the small bobbin bobbin E on the bobbin hanger 11 of the bobbin carrier 10 from which the full bobbin F was previously removed. It Similarly, the small bobbin E taken out from the creel 1 is suspended on the bobbin hanger 11 from which the full bobbin F has been removed, and the full bobbin F after the completion of the roving connection is suspended on the bobbin hanger 5 from which the small bobbin E has been removed. To be hung. The bobbin holding device 26 waits at the standby position while holding the small bobbin E until the last full bobbin F suspended from the bobbin carrier 10 is removed by the full bobbin transfer device 14.

After the full bobbin F is suspended on the creel 1 in the final cycle of the roving changing operation, the bobbin changing arm 1
6, 17 are arranged at positions where the pegs 18, 19 face the bobbin hanger 11 of the bobbin carrier 10 from which the full bobbin F has been removed. Next, the air cylinder 39 is operated and the piston rod 39a is retracted. Then, the bobbin holding device 26 is rotated in the clockwise direction in FIG. 10 together with the support arm 37, and is arranged at the bobbin transfer position shown in FIG. At this time, since the support plate 34 is in the raised position as shown in FIG. 2, the small bobbin E gripped by the bobbin gripping device 26 is located above the pegs 18, 19 and the pegs 18,1.
It is arranged at a position opposed to 9. Next, the air cylinder 29
Is operated to retract the piston rod 29a, and the bobbin gripping device 26 is moved downward together with the support plate 34. Then, the small bobbin E is attached to the pegs 18 and 19.

Next, the air cylinder 49 is actuated, the piston rod 49a is retracted, and each bobbin holding member 53 is actuated.
Is rotated to the bobbin opening side. Then, the grip of the small bobbin E by the bobbin gripping device 26 is released. When the rotation resistances of the gears 45a and 46a are different from those of the gears 47a and 48a, for example, when the support member 45 is rotated first, the support piece 45b is connected to the locking portion 50a during the retracting operation of the piston rod 49a. It abuts and its rotation is stopped. Further, when the retracting operation of the piston rod 49a is continued, the support member 48 is rotated together with the support member 47. And
The operation of the piston rod 49a is stopped with the support piece 48b in contact with the locking portion 51. That is, in the state where the piston rod 49a is located at the retracted position, the grip member 53 is always located at the predetermined open position.

Next, the air cylinder 39 is actuated and the piston rod 39a is actuated to project, and the bobbin gripping device 26 is pivotally arranged together with the support arm 37 to the standby position.
Return to the standby state shown in. Next, small ball bobbin transfer device 1
3 is operated and the bobbin changing arms 16 and 17 are moved up and down. Then, the small bobbin E mounted on the pegs 18 and 19 is suspended on the bobbin hanger 11 of the bobbin carrier 10, and the roving changing operation is completed.

As described above, the bobbin holding device 26 for holding the small bobbin E first taken out from the creel 1 until the end of the roving changing operation is arranged at the bobbin transfer position and the standby position by the horizontal rotation. It Also, pegs 18 and 1
Pulling out small bobbin E from 9 and pegs 18 and 19
The mounting of the small bobbin E on the bobbin E is performed by vertically moving the bobbin holding device 26 by the operation of the elevating mechanism 28. On the other hand, the bobbin transfer position is a position where the bobbin exchanging arms 16 and 17 take out the small bobbin E from the creel 1 and are arranged to face the transport rail 9. That is, the bobbin transfer position is one of predetermined positions in a series of operations of the bobbin exchange arms 16 and 17. Therefore, no special control is required for disposing the bobbin changing arms 16 and 17 at the bobbin transfer position, and the control of the small bobbin transfer device 13 is simplified.

Further, in the apparatus of this embodiment, since the proximity switches for detecting that the piston rods are arranged in the projecting position and the retracted position are arranged in each of the air cylinders 29, 39, 49, the lifting mechanism 28, When the rotating mechanism 27 or the gripping mechanisms 41, 42 are operated, it can be confirmed that the operation is reliably performed. Therefore, it is possible to avoid a failure in the transfer of the small bobbin E due to a malfunction.

The present invention is not limited to the above-mentioned embodiment, and each gripping mechanism 41, 42 is provided with an air cylinder or another gripping mechanism 41, 42 is provided with another opening / closing mechanism not using a gear. May be. Also, the rotating mechanism 2
7. The sensors for confirming the protrusion and depression of the piston rod of the lifting mechanism 28 and the gripping mechanisms 41, 42 may be omitted, or a hydraulic cylinder, a solenoid or a motor may be used as a drive source instead of the air cylinder. Also, the bobbin transfer position is the pegs 18 and 19 of the bobbin exchange arms 16 and 17.
Is not limited to the position facing the transport rail 9, but may be another position. Also, the small bobbin transfer device 13 and the full bobbin transfer device 1
Instead of providing both devices of No. 4, a small bobbin transfer operation and a full bobbin transfer operation may be performed by a pair of bobbin exchange arms. Furthermore, it may be applied to a roving yarn changer that does not include a roving yarn splicing device and performs only the roving yarn exchanging operation.

[0034]

As described above in detail, according to the present invention, the pair of small bobbins removed from the creel at the beginning of the roving exchanging operation without causing the bobbin exchanging arm side to perform an operation different from that in the normal operation. Since the bobbin holding device for temporarily holding the bobbin until the end of the roving exchange operation is moved to the bobbin transfer position only by rotating in the horizontal direction, the bobbin exchange arm can be easily controlled. In addition, since the small bobbin is transferred by raising and lowering the bobbin holding device side, it is not necessary to increase the maximum stroke of the bobbin exchanging arm. There is no need to raise it.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a bobbin holding device.

FIG. 2 is a side view showing a bobbin holding device.

FIG. 3 is a side view showing a relationship between a roving changer and a creel.

FIG. 4 is a schematic plan view showing the relationship between the small ball bobbin transfer device and the bobbin holding device when the small ball bobbin transfer device takes out the small ball bobbin from the creel.

FIG. 5 is a schematic plan view showing the relationship between the small ball bobbin transfer device and the bobbin holding device when the small ball bobbin transfer device is placed at the small ball bobbin suspension position.

FIG. 6 is a rear view of the bobbin holding device.

FIG. 7 is a side view of the bobbin holding device in which a support plate is arranged in a lowered position.

FIG. 8 is a partially cutaway schematic plan view showing the operation.

FIG. 9 is a partially cutaway schematic plan view showing the operation.

FIG. 10 is a partially cutaway schematic plan view showing the operation.

FIG. 11 is a partially cutaway schematic plan view showing the operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Creel, 2, 3 ... roving winding rail, 5 ... Bobbin hanger, 9 ... Conveying rail as a preliminary roving winding rail, 11 ...
Bobbin hanger, 13 ... Small bobbin transfer device, 16, 17
... bobbin exchange arm, 18, 19 ... peg, 26 ... bobbin gripping device, 27 ... turning mechanism, 28 ... lifting mechanism.

Claims (1)

[Claims] 1. Moving along the machine longitudinal direction of the spinning machine,
By moving the bobbin exchanging arm up and down and moving back and forth, the bobbin after the pair of front and rear roving threads suspended on the two rows of bobbin hangers on the front and rear of the creel and the spare roving thread suspended on the spare roving winding rail are exchanged. A bobbin gripping device for temporarily holding the pair of bobbins removed from the creel at the beginning of the roving thread replacement work until the end of the roving thread replacement work, wherein the bobbin gripping device is replaced with the bobbin replacement device. When the arm is arranged at a predetermined position in a series of operations, the rotation is made to rotate horizontally between the bobbin transfer position facing the peg of the bobbin exchange arm and the standby position that does not hinder the movement of the bobbin exchange arm. A moving mechanism, and an elevating mechanism for moving the bobbin holding device and the rotating mechanism to a position where the bottom surface of the bobbin attached to the peg is above the tip of the peg. The roving exchange apparatus of the machine.