JPH07113171B2 - Peg tray positioning device in the changer in spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention provides an empty space on a conveyor arranged below a spindle row of a spinning machine such as a ring spinning machine and a ring twisting machine in parallel with a spindle rail. Prepare a peg tray with bobbin in advance, after the spinning machine is fully loaded, run along one spindle rail from one end of the machine stand, take in the empty peg tray with bobbin on the conveyor, and transfer it to the position corresponding to the full bobbin on the spindle. The present invention relates to a peg tray positioning device in a pipe changer, which is arranged and sequentially replaces the empty bobbin on the peg tray with an empty bobbin that has been introduced and conveyed and the full bobbin on the spindle.

(Prior Art) In a spinning machine such as a ring spinning machine and a ring twisting machine, a full bobbin and an empty bobbin on the spindle are moved while moving the pipe changer from one end of the machine stand along the spindle rail after the machine stand is stopped. A pipe changer that automatically replaces
Japanese Patent Laid-Open No. 60-246828.
In the device of Japanese Patent Publication No. 56-8136, a large number of pegs are arranged on the conveyor below the spindle rail at a spindle pitch, and empty bobbins are prepared for insertion on the pegs in advance, and a plurality of grippers are provided. A pipe changing machine equipped with a doffing device and a donning device intermittently moves along the spindle rail during pipe changing work, whereby the full bobbin on the spindle and the empty bobbin on the peg are automatically exchanged.

On the other hand, in the device of Japanese Patent Laid-Open No. 60-246828, a full bobbin lifting device, an empty bobbin lifting device, a full bobbin insertion device,
A pipe changer equipped with an empty bobbin insertion device, a full bobbin transfer device, and an empty bobbin transfer device continuously runs along the spindle rail during pipe replacement, pulling out the full bobbins on the spindle one by one, and at the same time, removing the empty bobbin from the peg. One by one, and the full bobbin and the empty bobbin thus pulled out are automatically replaced one by one.

(Problems to be Solved by the Invention) However, as disclosed in Japanese Patent Laid-Open No. 60-52474, a full bobbin sent to a winder process by a conveying means that directly connects the spinning process and the winder process. In the case of sending the bobbin to the spinning process again, attention has been paid to the transfer method using a peg tray due to the advantage of simple mechanism compared to the use of a conveyor. The following problems are involved in interposing the peg tray in the automatic pipe replacement work. That is, in order for the conventional automatic pipe changer to smoothly perform the pipe change work, it is necessary to make the arrangement interval and the spindle pitch of the peg trays with empty bobbins prepared below the spindle rail the same. Accumulation of weight hinders accurate correspondence between the position of the peg tray arranged according to the number of spindles and the spindle position, and in order to achieve accurate position correspondence between this spindle and the peg tray, it is necessary to manufacture a high peg tray. Peg tray arranging means for arranging the peg trays with accuracy and a predetermined pitch is required.

Further, in the configuration of the conventional tube changer, the bobbin transfer time for replacing the empty bobbin and the full bobbin occupies a large proportion of the tube change time, and the tube change work time is prolonged and the machine down time is lengthened. There are also problems.

Configuration of the Invention (Means for Solving the Problems) In the present invention, therefore, an empty bobbin-equipped peg tray is prepared in advance on a conveyor that is arranged below the spindle row of the spinning machine in parallel with the spindle rail. After the pipes are completely stopped, the machine runs from one end of the machine base along the spindle rail to take in the empty bobbin-equipped peg tray on the conveyor, and also conveys it to the position corresponding to the full bobbin on the spindle. Targeting a pipe changer that sequentially replaces the empty bobbin above and the full bobbin on the spindle, a traveling body that is reciprocally driven in the traveling direction is installed in the pipe changer, and the empty bobbin on the peg tray with an empty bobbin inside the pipe changer is installed. Remove the full bobbin and insert it into the spindle after pulling it up. The empty bobbin is inserted into the peg tray after the empty bobbin is removed, and the full bobbin lifting / inserting device is attached to the traveling body, and the position regulating piece is provided at the operating position on the transport path of the empty bobbin-attached peg tray and the inactive position retracted from the transport path. And a second peg tray position restricting device for switching and arranging the position restricting piece between the working position of the peg tray from which the empty bobbin has been removed on the transport path and the inactive position retracted from this transport path. A position control device was installed on the moving body.

(Operation) That is, the peg tray with an empty bobbin introduced into the running pipe changer is conveyed to the operating position of the position restricting piece of the first peg tray position restricting device, and engages with the position restricting piece in the operating position. . Under this engaged state, the empty bobbin of the peg tray with empty bobbin is extracted by the empty bobbin extracting / inserting device. By matching the speed of the traveling body that reciprocates in the traveling direction in the pipe changer with the traveling speed of the pipe changing machine, the traveling body traveling in the direction opposite to the traveling direction of the pipe changing machine is relative to the spindle. At this time, the empty bobbin removing / inserting device on the traveling body and the full bobbin removing / inserting device are pulled out under this condition. After the empty bobbin is removed, the position restricting piece of the first peg tray position restricting device is switched from the operating position to the inactive position, and the peg tray released from the engaging operation of the position restricting piece is located at the position of the second peg tray position restricting device. The control piece is conveyed to the operating position. Then, the full bobbin pulling and inserting device inserts the full bobbin on the peg tray which is subjected to the position regulating action.

(Example) Hereinafter, one example which materialized the present invention is described based on a drawing.

As shown in FIGS. 1 to 4, the pipe changer 1 travels along the spinning frame by means of guide rollers 4 and 5 that engage with rails 2 and guide rails 3 fixed to the spinning frame. The pins 6 projectingly supported on the rail 2 at predetermined intervals and the screw roller 8 driven by the drive motor 7 engage with each other to travel along the rail 2.

A tray guide 10 is extended on the upper surface of the guide rail 3 in parallel with the spindle rail 9, and a conveyor belt 11 is arranged so as to travel in the tray guide 10. A peg tray 13 having substantially the same diameter as the pitch of the spindle 12 is placed on the conveyor belt 11, and the peg tray 13A with an empty bobbin is attached to the spindle 12 before the pipe replacement work.
Are arranged on the conveyor belt 11 in a state substantially corresponding to.

As shown in FIG. 1, a conveyor belt is provided below the pipe changer 1.
A peg tray intake plate 14 for taking in the empty bobbin-equipped peg tray 13A inside the pipe changer 1 and a peg tray transfer plate 15 for delivering the full bobbin-equipped peg tray 13B onto the conveyor belt 11 are arranged before and after the pipe changer 1 in the traveling direction. It is set up. Peg tray intake plate
Numeral 14 is driven to be switched between an intake position for engaging the empty bobbin-equipped peg tray 13A on the tray guide 10 and a retracted position shown by a chain line, and the peg tray transfer plate 15 is also switched to be driven to a transfer position shown by a solid line and a retracted position shown by a chain line. It An engaging member 82 is disposed above the peg tray intake plate 14 and engages with the top of the empty bobbin E of the empty bobbin-equipped peg tray 13A on the tray guide 10 to incline the empty bobbin E toward the spinning machine base side. .

On the front side of the pipe changer 1 (the side facing the spinning machine), a transfer belt 20 driven by a motor 19 and a twisting and conveying device 16 composed of a pair of linear guide members 21 are arranged, and a peg tray intake plate. The peg tray 13A with an empty bobbin taken in by 14 is conveyed to a position above the full bobbin F on the spindle 12 and at a position corresponding to the full bobbin F, and the peg tray 13 from which the empty bobbin E has been pulled out is placed at this conveyance arrangement position. The peg tray 13B with a full bobbin having the full bobbin F inserted therein is conveyed to the peg tray delivery device 15 at a position almost the same height as the lower part of the spindle 12. At the center of the pipe changer 1, there is a spindle 12
The empty bobbin E is inserted from the empty bobbin-equipped peg tray 13A conveyed above the upper full bobbin F and the empty bobbin E is inserted into the spindle 12 from which the full bobbin F is lifted, and the spindle 17 A full bobbin pulling-up / inserting device 18 for pulling up the full bobbin F from 12 and inserting the full bobbin F into the peg tray 13 conveyed at the same height as the lower part of the spindle 12 is provided.

As shown in FIGS. 1 and 4, the transfer belt 20 of the torsion transfer device 16
Are parallel to the tray guide 10, parallel to the lower part of the spindle 12 and parallel to the spindle rail 9 above the full bobbin F on the spindle 12. The tray guide 10 is wound around a large number of guide pulleys 22 so as to have a traveling portion.
It is set so that the portion running in parallel with the direction of travel of the pipe changer 1 coincides with the traveling direction. The pair of guide members 21 sandwich the pegs of the peg tray 13 and transfer the peg tray 13 to the transfer belt 20.
The peg tray 13 can be conveyed in any posture by being biased to the side. Therefore, the posture of the empty bobbin E or the full bobbin F on the peg tray 13 can be freely changed.

As shown in FIGS. 3 and 4, a bobbin supporting member 23 is supported on the upper portion of the pipe changer 1 so as to be swingable back and forth, and is always rotated by a torsion spring 24 toward the torsion transfer device 16 side. It is urged into contact with the stopper 25. In this state, the bobbin support member 23
The bent portion of the lower end of the bobbin E supports the top of the empty bobbin E of the peg tray 13A with an empty bobbin transferred by the twist transfer device 16.

As shown in FIGS. 3 and 4, on the inner surface of the rear wall of the pipe changer 1, a pair of support shafts 26 and 27 are vertically arranged in parallel with the spindle rail 9. A traveling body 28 equipped with an empty bobbin removing / inserting device 17 and a full bobbin removing / inserting device 18 is slidably supported.

Explaining the empty bobbin extracting / inserting device 17, a support shaft 29 is rotatably supported on the upper part of the traveling body 28, and arms 30 are fixed to both ends of the supporting shaft 29 protruding to the outside of the traveling body 28. At the same time, the bobbin gripping device 31 is rotatably supported between the ends of the bobbin. A rotary shaft 32 operatively connected to the drive motor 7 is arranged in the center of the traveling body 28, and the rotation of the rotary shaft 32 is transmitted to a gear 33 on the support shaft 29 via a transmission means (not shown). As a result, the bobbin holding device 31 is pivotally arranged between the empty bobbin receiving position and the empty bobbin releasing position. A tubular gear 34 is rotatably supported on the support shaft 29, and a lever 35 is fixedly attached to one end thereof. One end of the rod 36 is rotatably connected to the tip of the lever 35, and the other end is rotatably connected to the bobbin holding device 31.

The bobbin gripping device 31 will be described. As shown in FIG. 5, a plurality of pairs of gripping pieces 38, 39 (four pairs in this embodiment) are arranged on the support frame 37 at the same pitch as the spindle 12. The two gripping pieces 38, 39 are rotatably meshed with each other. An engaging plate 40 is disposed immediately above the support frame 37, is guided slidably in the longitudinal direction of the support frame 37 by a guide pin 37a on the support frame 37, and the supporting frame 37 and the engaging plate 40 are also provided. Is urged in a direction to engage with the engagement roller 38a on the gripping piece 38 by a tension spring 41 interposed between and. A tension spring 42 is also interposed between the engagement plate 40 and each grip piece 38. Extension spring 41,42
A wire 43 is connected to one end of the engagement plate 40 that is urged in a direction to engage with the engagement roller 38a by
The other end of the wire 43 is connected to the rotary shaft 32 via a cam mechanism (not shown).
The empty bobbins are released from the gripping pieces 38, 39 in synchronization with the traveling of the pipe changer 1.

Next, the full bobbin pull-up and insertion device 18 will be described. As shown in FIGS. 3 and 4, a rotating support shaft 44 is provided below the support shaft 29.
Is supported, and the rotation support shaft 44 protruding outside the traveling body 28
A support arm 45 is fixed to both ends of the shaft, and a support shaft 46 is erected and supported between the ends of the support arms 45. Support shaft
A pair of arms 47 is rotatably supported by 46, and a bobbin holding device 48 having substantially the same structure as the bobbin holding device 31 is rotatably supported between the ends of the arms 47. Support shaft
A support cylinder 49 is rotatably supported by 29, and a lever 50 is fixed to one end of the support cylinder 49. One end of a rod 51 is rotatably connected to one end of the lever 50, and the other end is rotatably connected to a shaft 52 provided between intermediate portions of the arms 47. A connecting lever 53 is rotatably supported at one end of the support shaft 46, one end of a rod 54 is rotatably connected to the tip thereof, and the other end is connected to a bobbin holding device 48. There is. A rotation lever 55 is rotatably supported on the rotation support shaft 44 and is operatively connected to the rotation shaft 32 by a transmission means (not shown). The rotation lever 55 and the connection lever 53 are connected by a link 56. It is connected.

The rotating shaft 32 for driving the empty bobbin removing / inserting device 17 and the full bobbin removing / inserting device 18 is a screw roller 8.
The driving force is obtained from the driving motor 7 via the driving motor 7. As shown in FIGS. 3 and 4, the screw roller 8 is rotated by a driving pulley 57, a driven pulley 58, a clutch mechanism (not shown), a bevel gear mechanism 59, and a ball. Rotating shaft 60 consisting of spline shaft, traveling body
Transmission to the rotary shaft 32 via a ball bush 61 fixed to the rotary shaft 60 and in a sliding fit relationship with the rotary shaft 60, a sprocket 62 rotatably supported by the ball bush 61, a chain 63 and a sprocket 64 on the rotary shaft 32. To be done.

A cam 66 is attached to the front-rear intermediate shaft 65 that constitutes the bevel gear mechanism 59.
The cam lever 67 is attached to the
The upper cam follower 67a is engaged with the cam groove 66a of the cam 66. The tip end of the cam lever 67 is connected to the connecting portion 68 at the lower end of the traveling body 28, and the cam lever 67 swings left and right in accordance with the rotation of the cam 66, and the traveling body 28 reciprocates on the support shafts 26, 27. .

A support bracket 69 is erected and fixed on an upper part on one side of the traveling body 28 (on the traveling side of the pipe changer 1).
A shaft 70 is rotatably supported in the front-rear direction at the upper end of the, and a substantially L-shaped position regulating arm 71 is fixed to the tip thereof. A rotary solenoid 72 is mounted on an upper portion of the support bracket 69, and a shaft 70 is operatively connected to a drive shaft 72a of the rotary solenoid 72 via a link mechanism 73. The rotary solenoid 72 reciprocates, whereby the position regulating arm 71 engages with the empty bobbin-equipped peg tray 13A on the transport path of the empty bobbin-equipped peg tray 13A as shown by the solid line in FIG. As shown, the empty bobbin-equipped peg tray 13A is switched to the inoperative position retracted from the transport path. That is, the rotary solenoid 72, the link mechanism 73, the shaft 70, and the position restricting arm 71 constitute a first peg tray position restricting device 74.

As shown in FIG. 3, a support bracket 75 extends toward the lower part of the spindle 12 toward the front of the pipe changer 1 on the left and right sides (opposite side of the pipe changer 1) of the traveling body 28. A known cutter 76 that cuts the yarn connecting from the full bobbin F to the spinning machine side at the time of tube change is attached to the tip end portion thereof via a mounting bracket 77. A rotary solenoid 78 is mounted on the support bracket 75,
A position regulation piece 79 is fixed to the drive shaft 78a. The rotary solenoid 78 is reciprocally driven, whereby the position regulating piece 79 has the peg tray 13 from which the empty bobbin E has been removed by the empty bobbin removing / inserting device 17 as shown by the solid line in FIG.
Is switched between an operating position for engaging the empty bobbin-equipped peg tray 13A on the transport path and an inactive position retracted from the transport path for the peg tray 13 as shown by the chain line. That is, the rotary solenoid 78 and the position restricting piece 79 form a second peg tray position restricting device 80. A similar position regulating piece 81 is also arranged on the other side of the traveling body 28.

Now, when the spinning machine stops due to a full pipe command, the pipe changer 1 stopped at the machine base end starts traveling at a constant speed, and
The motor 19 of the twisting and conveying device 16 starts driving, and the transfer belt 20
Starts moving in the direction of the arrows in Figs. When the pipe changer 1 starts traveling, the peg tray intake plate 14 and the peg tray transfer plate 15 are arranged at the working positions intersecting with the tray guide 10, and the position control arm 71 and the position control piece 79 are on the transfer path of the twist transfer device 16. Of the peg tray 13 with four position regulating pieces 79.
Is engaged with. As the pipe changer 1 runs, the tray guide
When the engaging member 82 reaches the position corresponding to the empty bobbin E on the empty bobbin-equipped peg tray 13A on 10, the top of the empty bobbin E engages with the engaging member 82 and the empty bobbin E tilts toward the spinning machine frame side, The movement of the replacement machine 1 causes the peg tray intake plate 14 to engage with the peg 13a of the peg tray 13A with an empty bobbin. As a result, the lower surface of the empty bobbin-equipped peg tray 13A is taken into the pipe changer 1 that engages with the transfer belt 20 of the twist transfer device 16.

Peg tray 13 with an empty bobbin installed in the pipe changer 1
A is conveyed above the pipe changer 1 by the cooperation of the transfer belt 20 and the guide member 21, and is engaged with the position regulating piece 79. The top of the empty bobbin E on the peg tray 13A with an empty bobbin is supported by the lower end bent portion of the bobbin supporting member 23 by the time the drive of the empty bobbin extracting / inserting device 17 is started, and stands by corresponding to the pitch of the spindle 12. The traveling body 28 is arranged on the side opposite to the position shown in FIG. 4 at the start of traveling of the pipe changer 1, that is, on the side opposite to the advancing side of the pipe changer 1, and the full bobbin lifting and inserting device 18 is the first spindle 12. When it passes through, the rotational driving force of the screw roller 8 is transmitted to the cam 66 via the clutch mechanism (not shown), the traveling body 28 moves to the advancing side of the pipe changer 1, and the empty bobbin extracting / inserting device 17 and The full bobbin lifting and inserting device 18 starts driving.

At the time when the traveling body 28 is arranged at the most advanced position shown in FIG. 4, the holding pieces 38, 39 of the full bobbin lifting / inserting device 18 are released to the upper position corresponding to the spindle 12 as shown in FIG. The bobbin gripping device 31 of the empty bobbin removing / inserting device 17 grips the empty bobbin E on the peg tray 13A with empty bobbin whose position is restricted by the position restricting arm 71, and moves to the last retracted position shown by the chain line. The empty bobbin E on the peg tray with empty bobbin 13A is moved by the position restricting arm 71 that moves integrally with the moving member 28.
28 Bobbin gripping device of empty bobbin removing / inserting device 17 on 31
The empty bobbin E is accurately positioned on the gripping path, and the empty bobbin E can be smoothly and quickly removed from the empty bobbin-equipped peg tray 13A.

When the pipe changer 1 further travels from this state, the traveling body 28 moves in the direction opposite to the traveling direction of the pipe changer 1, and the positional relationship between the empty bobbin removing / inserting device 17 and the full bobbin pulling up / inserting device 18 with respect to the spindle 12. Is constant. When the traveling body 28 starts moving in the opposite direction, the support arm 45 of the full bobbin lifting / inserting device 18 is rotated clockwise in FIG.
The rotating lever 55 is rotated counterclockwise. As a result, the bobbin holding device 48 moves down to a position corresponding to the full bobbin F on the spindle 12 while holding the holding piece in a horizontal state, and holds the top of the full bobbin F. Subsequently, the support arm 45 is rotated in the counterclockwise direction together with the rotation support shaft 44, and the lever 50 and the rotation lever 55 are driven in synchronization with this. As a result, the full bobbin F is pulled out from the spindle 12.

After withdrawing the full bobbin F, the support arm 45 is rotated again in the clockwise direction, the lever 50 and the rotation lever 55 are rotated in the clockwise direction, and the position of the full bobbin F is restricted by the position restricting piece 79. The peg tray 13 is inserted on the peg 13a. The peg tray 13 is also accurately positioned on the gripping path of the bobbin gripping device 48 of the full bobbin lifting / inserting device 18 on the running body 28 by the position regulating action of the position regulating piece 79 that moves integrally with the traveling body 28. The full bobbin F is inserted into the peg tray 13 smoothly and quickly.

The empty bobbin E gripped by the bobbin gripping device 31 of the empty bobbin removing / inserting device 17 is inserted onto the spindle 12 when the full bobbin F is inserted into the peg tray 13, and the empty bobbin E and the full bobbin F on the spindle 12 are replaced. Is complete,
This exchange is smoothly performed by aligning the spindle 12 and the peg tray 13 in the pipe changer 1 by utilizing the reciprocating motion of the traveling body 28 in the pipe changer 1 that runs, and with an empty bobbin on the conveyor device below the spindle 12. There is no need to require strictness in the arrangement pitch accuracy of the peg tray 13A. Therefore, problems regarding the mechanical complexity of the conveyor device and the manufacturing accuracy of the peg tray are solved. The empty bobbin E is removed from the peg tray 13 in the pipe changer 1 that forms a pipe change mechanism that solves such a problem, and the full bobbin F for the peg tray 13 is removed.
Insertion is performed smoothly and quickly based on the accurate peg tray positioning described above, and as a result, pipe replacement is smoothly performed. Moreover, the structure in which the empty bobbin is taken in together with the peg tray and the full bobbin is discharged together with the peg tray results in shortening the bobbin transfer time between the spindle 12 and the conveyor belt 11 and improving the efficiency of the pipe replacement work.

After removing the empty bobbin E, the rotary solenoid 72 is driven and the position regulating arm 71 is pivotally arranged at the retracted position.
Further, after the full bobbin F is inserted, the rotary solenoid 78 is driven and the position regulating piece 79 is rotationally arranged at the retracted position. As a result, the full bobbin-equipped peg tray 13B is moved downward toward the peg tray transfer plate 15, and is sequentially transferred onto the conveyor belt 11 by the action of the peg tray transfer plate 15. After the full bobbin-equipped peg tray 13B passes through the peg tray position restricting device 80, the position restricting piece 79 is pivoted again to the working position, and is moved downward from the empty bobbin removing / inserting device 17 side toward the peg tray position restricting device 80. The peg tray 13 waits in a state of being engaged with the position regulating piece 79, and thereafter, a similar pipe changing operation is performed.

Of course, the present invention is not limited to the above-mentioned embodiment, and for example, a peg tray position regulating device uses a linear solenoid or an air cylinder instead of the rotary solenoid drive system, and its drive rod is used as a position regulating member, or a pipe changer. It is also possible to employ an embodiment in which the position regulating member is switched between the working position and the retracted position by using the cam mechanism that is driven in synchronization with the first traveling.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, the empty bobbin removing / inserting device for removing the empty bobbin on the peg tray with empty bobbin in the pipe changer and inserting the empty bobbin on the spindle after pulling up the full bobbin, and the full bobbin on the spindle Install the full bobbin withdrawal / insertion device that raises and inserts into the peg tray after removing the empty bobbin to the traveling body that reciprocates in the traveling direction of the pipe changer, and from the operating position and the transportation route of the empty bobbin peg tray. A first peg tray position restricting device for switching and arranging a position restricting piece to the retracted inactive position, a peg tray from which an empty bobbin has been pulled out, and a working position on the transport route and an inactive position retracted from the transport route. Since the second peg tray position restricting device for switching the restricting pieces is installed on the traveling body, the empty robots arranged on the conveyor below the spindle are arranged. When replacing an empty bobbin on the peg tray with a bin and a full bobbin on the spindle, the empty bobbin can be smoothly removed from the peg tray and inserted into the peg tray in the pipe changer. This has an excellent effect that the work efficiency of pipe replacement can be achieved while simplifying the mechanism of the arranging means.

[Brief description of drawings]

The drawings show an embodiment embodying the present invention. Fig. 1 is a schematic perspective view showing the relationship between a pipe changer and a spinning machine and a state of removing an empty bobbin, and Fig. 2 is a schematic view showing a state of inserting a full bobbin. FIG. 3 is a perspective view, FIG. 3 is a side sectional view of the pipe changer, FIG. 4 is a rear view of the same, and FIG. 5 is a plan view of essential parts showing a bobbin holding device of an empty bobbin extracting / inserting device. Pipe changer …… 1, peg tray …… 13, peg tray with empty bobbin …… 13A, peg tray with full bobbin …… 13B, empty bobbin removing / inserting device …… 17, full bobbin withdrawing / inserting device …… 18, running body… 28, bobbin gripping device 31, 48,
Position regulating arm ... 71, first peg tray position regulating device ... 74, position regulating piece ... 79, second peg tray position regulating device ... 80, empty bobbin ... E, full bobbin ... F.

Front Page Continuation (72) Inventor Haruka Nakamura 2-1-1 Toyota Town, Kariya City, Aichi Prefecture Toyota Industries Corporation

Claims (1)

[Claims] 1. A peg tray with an empty bobbin is prepared in advance on a conveyor which is arranged below a spindle row of a spinning machine in parallel with the spindle rail, and after the spinning machine stand is completely filled, the spindle rail is moved from one end of the machine stand to the spindle rail. It runs along and takes in the empty bobbin-equipped peg tray on the conveyor, transports it to the position corresponding to the full bobbin on the spindle, and sequentially replaces the empty bobbin on the empty bobbin-equipped peg tray that has been taken in and transported and the full bobbin on the spindle. In the pipe changer, a traveling body that is reciprocally driven in the traveling direction is installed in the pipe changer, and the empty bobbin on the peg tray with an empty bobbin in the pipe changer is removed and inserted into the spindle after the full bobbin is pulled out. The insertion device and the full bobbin on the spindle are pulled out and inserted into the peg tray after removing the empty bobbin. A first peg tray position restricting device, in which a position pulling and inserting device is mounted on the traveling body, and the position restricting pieces are arranged to be switched between an operating position on the conveying route of the empty bobbin-equipped peg tray and an inactive position retracted from the conveying route. And a second peg tray position restricting device for switching and disposing the position restricting piece between the working position of the peg tray from which the empty bobbin is pulled out and the non-acting position retracted from the carrying route. A peg tray positioning device in a changer in a spinning machine.