JPH07133519A - Rotary positioning mechanism of cop changer of spinning frame - Google Patents

Abstract

PURPOSE:To prevent the exertion of excessive force on a moving member of a driving means by the force generated by the contact of a contacting part formed on a piston rod of a driving cylinder with a stopper member and minia turize an attaching bracket for holding the driving means. CONSTITUTION:A fine spinning frame is provided with a driving cylinder 29 for rotating the whole pantograph mechanism by the expansion or contraction of a piston rod 30 via a transmission mechanism. The piston rod 30 has a contact face 35a and the driving cylinder 29 is provided interposing an attaching bracket 36 with a stopper cylinder 38 having a piston rod 39 movable in the direction perpendicular to the axial direction of the piston rod 30. A stopper 44 is attached to the piston rod 39 via a bracket 41. The stopper 44 is brought into contact with the contacting face 35a by properly driving the piston rods 30,39 to position the piston rod 30 at the intermediate stroke position and the pantograph mechanism at the intermediate position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary positioning mechanism in a pipe changing device for a spinning machine such as a ring spinning machine and a ring twisting machine. More specifically, the whole pantograph mechanism provided in the pipe changing device has a vertical position and a spinning machine. The present invention relates to a rotation positioning mechanism in a pipe replacement device that rotates between a position inclined to the outside of a table and surely positions it at a predetermined position.

[0002]

2. Description of the Related Art In recent years, automation in spinning factories has progressed,
In a spinning machine such as a ring spinning machine or a ring twisting machine, a doffing device automatically performs a doffing operation associated with a full pipe and a pipe replacement operation for inserting a new empty bobbin into a spindle. As a pipe changer, a movable type pipe changer that moves along the machine base requiring work to perform pipe change work by one spindle or by multiple spindles, and all spindles equipped for each spinning machine There is a type of pipe changer. In the all-mass simultaneous pipe changer, a conveyor device is provided below the spindle row of the spinning machine stand, in which pegs are projected at the same pitch as the spindle pitch, and the pitch is the same as the spindle pitch between the conveyor apparatus and the spindle row. The pedestal is provided with the middle peg projecting. A doffing bar equipped with bobbin gripping devices arranged at the same pitch as the spindle pitch is displaced up and down between the spindle row and the conveyor device by the pantograph mechanism, and the entire pantograph mechanism approaches the spinning machine stand. There is disclosed a device which is configured to be rotatable to a position separated from (for example, Japanese Patent Publication Sho 48).
-30970, JP-A-2-289130). The operation of the pantograph mechanism is performed by the reciprocating movement of a rod extending along the longitudinal direction of the machine base, and a so-called power cylinder equipped with a ball screw mechanism that is normally and reversely driven by a motor is used as a rod driving means. . The rotating device includes a drive rod extending in the longitudinal direction of the machine base, and a link mechanism connected to the drive rod. The reciprocating motion of the drive rod causes the pantograph mechanism to rotate via the link mechanism. .

At the time of pipe replacement work, the pantograph mechanism holds the empty bobbin or the like on the conveyor device (closed position),
When the doffing bar is raised or lowered in the pantograph mechanism, it does not interfere with each part of the ring spinning machine (open position), and is positioned at a position (intermediate position) for inserting or withdrawing an empty bobbin from the intermediate peg on the pedestal. There is a need to.

As shown in FIG. 10, a spinning machine such as the ring spinning machine or the ring twisting machine is provided with a drive cylinder 61 for rotating the pantograph mechanism about the rod through a link mechanism. There is.

That is, the pantograph mechanism rotates as the piston rod 62 provided on the drive cylinder 61 expands and contracts. At this time, as shown in FIG. 10, when the piston rod 62 is at the most extended position (maximum protruding position), the pantograph mechanism is located at the open position. or,
As shown in FIG. 12, when the piston rod 62 is in the most contracted position (the retracted position), the pantograph mechanism is in the closed position. Further, as shown in FIG. 11, when the piston rod 62 is at a predetermined position (intermediate stroke position) between the maximum protruding position and the retracted position, the pantograph mechanism is located at the intermediate position.

A mounting bracket 63 is attached to the drive cylinder 61, and a stopper cylinder 64 is attached to the mounting bracket 63. The stopper cylinder 64 is oriented in a direction orthogonal to the piston rod 62. It has a piston rod 65 that enables expansion and contraction. The piston rod 6 is attached to the tip of the piston rod 65.
A cylindrical stopper 66 extending in the expansion and contraction direction of 5 is attached.

When the piston rod 62 is retracted, the contact portion 67 provided on the piston rod 65 and the stopper 66 are provided.
By bringing the and the abutting against each other, the retracting operation of the piston rod 62 is restricted. In this case, the contact portion 67 is the stopper 66.
The position where the piston rod 62 comes into contact with and the piston rod 62 stops is the intermediate stroke position of the piston rod 62, and the pantograph mechanism is positioned at the intermediate position.

[0008]

[Problems to be Solved by the Invention] As shown in FIG.
At the intermediate stroke position of the piston rod 62,
The force generated by the immersing operation of the piston rod 62 is the stopper 66.
And the piston rod 65. At this time, all the force due to the retracting operation of the piston rod 62 directly acts on the piston rod 65, so that there is a problem that the piston rod 65, the stopper 66, and the like must be manufactured from members having strength. Further, there is a problem that the force due to the immersing operation causes the stopper 66 and the piston rod 65 to bend, and the piston rod 65 cannot be accurately positioned at the intermediate stroke position. Further, there is a problem that the stopper cylinder 64 may be broken or malfunction due to the bending of the piston rod 65 or the like.

Further, the stopper 66 and the piston rod 65
The force acting on is transmitted to the stopper cylinder 64 itself and received by the mounting bracket 63. For this reason, the mounting bracket 63 must be strong enough to receive the force due to the retracting operation of the piston rod 62,
There is a problem of increasing the size.

The present invention has been made to solve the above problems, and its purpose is to provide a force generated by the contact between a contact portion provided on a piston rod of a drive cylinder and a stopper member to a stopper member. It is possible to prevent an unreasonable force from acting on the moving body of the drive means for moving the drive means to the contact position and the retracted position, and to reduce the size of the mounting bracket to which the drive means is attached. It is to provide a dynamic positioning mechanism.

[0011]

In order to solve the above problems, the present invention provides a drive cylinder for rotating the entire pantograph mechanism provided in the pipe changing device of a spinning machine by expanding and contracting a piston rod through a transmission mechanism. The piston rod is provided with an abutting portion, and the drive cylinder is provided with a drive means having a movable body that is movable in a direction substantially orthogonal to the axial direction of the piston rod via a mounting bracket. A stopper member is attached to the movable body so that it can be arranged at a contact position where it can contact the contact portion of the piston rod by the movement of the movable body and a retracted position where it cannot contact. In the position, the gist is that the stopper member is sandwiched between the contact portion and the drive cylinder.

[0012]

Therefore, according to the present invention, the pantograph mechanism provided in the pipe changing device of the spinning machine is further rotated via the transmission mechanism for the expansion and contraction of the piston rod of the drive cylinder. For example, the pantograph mechanism is positioned in the most open state (open position) when the piston rod of the drive cylinder is in the maximum protruding position, and is positioned in the most closed state (closed position) that is vertical when the piston rod is in the retracted position. Further, by disposing the piston rod at a predetermined position (intermediate stroke position) between the maximum protruding position and the retracted position,
The pantograph mechanism is positioned at an intermediate position located between the open position and the closed position.

In order to position the piston rod at the intermediate stroke position, the stopper member is brought into contact with the stopper member from the retracted position by driving the driving means while the piston rod is arranged at the maximum projecting position to move the moving body. Move to position. Then, the piston rod is retracted from the maximum protruding position, the contact portion of the piston rod and the stopper member are brought into contact with each other, and the stopper member is sandwiched between the contact portion and the drive cylinder. It is held at the intermediate stroke position. At this time, the pantograph mechanism is positioned at the intermediate position.

In this case, the force generated by the contact between the contact portion and the stopper member is transmitted to the drive cylinder directly via the stopper member or via the mounting bracket supporting the stopper member, and the drive cylinder is connected. Can be received at. Therefore, an unreasonable force for bending the stopper member or the like does not act on the stopper member or the like, and the piston rod can be accurately positioned at a predetermined position. Further, since no unreasonable force acts on the mounting bracket, it is possible to reduce the size or weight of the mounting bracket.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a ring spinning machine will be described below with reference to FIGS.

As shown in FIG. 1, a large number of spindles 3 are arranged on a spindle rail 2 of a spinning frame 1 at a constant pitch, and a bobbin is transferred below the spindle rail 2 using a peg tray 4. Publicly known (for example, JP-A-6
The bobbin transfer device 5 of JP-A-3-145438) is provided. A support bar 6 is provided on the front side of the spindle rail 2 along the spindle rail 2, and an intermediate peg 7 is provided on the upper surface of the support bar 6 at the same pitch as the spindle pitch. Further, the spinning machine base 1 is equipped with a pipe changing device 8 of a known structure, which is of the whole spindle simultaneous type.

As shown in FIGS. 1 and 2, in the pipe changing device 8, a doffing bar 10 having a bobbin holding device 9 arranged at the same pitch as the spindle pitch is moved up and down by a so-called pantograph mechanism 11, and The entire pantograph mechanism 11 is configured to be rotatable around a rod 12 that vertically moves the pantograph mechanism 11.

Link 1 constituting pantograph mechanism 11
3, 14 are arranged at a plurality of positions at predetermined intervals, and the other end of the link 13 whose one end is connected to the doffing bar 10 is connected to the moving bracket 15 which is fixed so as to be integrally movable with respect to the rod 12. ing. A link 14 having a length half that of the link 13 has one end pin-connected to the center of the link 13 and the other end pin-connected to the support bracket 16. The position of the support bracket 16 is regulated by the fixed bracket 17, and the support bracket 16 is arranged so as to allow the rod 12 to slide. The rod 12 is reciprocated by the operation of a power cylinder 18 arranged at one end of the spinning frame 1 in the longitudinal direction. The doffing bar 10 moves up and down by the reciprocating movement of the rod 12.

Further, one end of a lever 19 is fixed to each support bracket 16 and extends toward the inside of the spinning machine base 1 in a direction orthogonal to the longitudinal direction of the spinning machine base 1.
The other end of the lever 19 is connected to a transmission mechanism 20 that rotates the pantograph mechanism 11 as a whole.
In this embodiment, various devices such as the spindle rail 2, the bobbin transfer device 5 and the pipe changing device 8 are the spinning machine base 1
Each of the pantograph mechanisms 11 mounted on both sides in the width direction of the spinning machine is mounted on both sides of the spinning frame 1 by the action of the transmission mechanism 20.

As shown in FIGS. 2 to 4, the transmission mechanism 2
Reference numeral 0 includes a bracket 21 fixed to the frame B at a substantially central portion in the width direction of the spinning machine base 1, and the bracket 21 is provided with a pair of arm portions 22. The pair of arms 22 extends obliquely downward in parallel to the longitudinal direction of the spinning machine base 1, and a shaft 23 is fixedly inserted between the tip ends of the arms 22. The shaft 23 is arranged parallel to the width direction of the spinning machine base 1. This axis 23
A substantially L-shaped rotation lever 24 is rotatably supported by inserting the shaft 23 into the bent portion 25 of the rotation lever 24. Then, at one end of the rotating lever 24, a pair of links 26 are connected to both sides in the width direction thereof via universal joints 27, respectively. And
The lever 19 is connected to the lower end of the link 26 via a universal joint 28.

A drive cylinder 29 driven by air or the like is provided at the longitudinal end of the spinning frame 1 at one end in the longitudinal direction of the spinning frame 1 approximately at the center of the spinning frame 1. It is arranged along the direction. This drive cylinder 2
The base end of 9 is rotatably supported at one end of the spinning frame 1. A drive rod 31 is attached to the tip of the piston rod 30 of the drive cylinder 29. The drive rod 31 is configured by connecting a plurality of rods 32 via a connecting block 33 at a position substantially corresponding to the lever 19. At this time, the shaft pin 34 penetrating the connecting block 33 is inserted into the connecting portion 32 a of the rod 32 with the connecting block 33, and each rod 32 is rotatably provided around the shaft pin 34. . The connecting block 33 and the shaft pin 34 are fixed to the other end of the rotary lever 24, and the vertical displacement of the other end of the rotary lever 24 caused by the rotation of the rotary lever 24 causes the rotation of each rod 32. It is designed to be absorbed by movement.

5 and 6 are plan views showing the drive cylinder 29. A contact ring 35 having a diameter larger than that of the piston rod 30 is attached to the piston rod 30 of the drive cylinder 29. A cylinder bracket 36 as a mounting bracket is attached to the front end portion (on the piston rod 30 side) of the drive cylinder 29. The cylinder bracket 36 is formed with a flat sliding surface 36a extending in a direction orthogonal to the axial direction of the piston rod 30. This sliding surface 36a is the cylinder bracket 3
6 is formed over the entire width direction. Further, an L-shaped attachment portion 37 is integrally formed on one side of the cylinder bracket 36. A stopper cylinder 38 as a driving means driven by air or the like is attached to the attachment portion 37 in a direction orthogonal to the piston rod 30. Piston rod 39 of this stopper cylinder 38
Is movably provided in a direction orthogonal to the piston rod 30. Further, a non-contact type detection sensor 40 is attached to the attachment portion 37. Also, the piston rod 39
A bracket 41 is fixed to the tip of the. The detection sensor 40 side of the bracket 41 is bent so as to be parallel to the detection surface 40 a, and the bent portion serves as a detection piece 42 detected by the detection sensor 40. Further, the cylinder bracket 36 side is bent toward the piston rod 30 side, and a supporting portion 43 slidable on the sliding surface 36a.
Are formed. A columnar stopper 44 extending in parallel with the piston rod 30 is fixed to the tip of the support portion 43. In the present embodiment, the piston rod 38 and the bracket 41 form a moving body.

As shown in FIG. 5, by causing the piston rod 39 to project, the stopper 44 approaches the piston rod 30 and comes into contact with the contact surface 35a of the contact ring 35 (contact position). ). At this abutting position, the axis of the stopper 44 is located within the width of the drive cylinder 29. And at this contact position,
The detection sensor 40 detects the detection piece 42 of the bracket 41. Further, as shown in FIGS. 4 and 6, the stopper 4 is moved by retracting the piston rod 34.
4 is separated from the piston rod 30 and is arranged at a position (retracted position) where the contact surface 35a cannot be contacted. At this time, the detection sensor 40 does not detect the detection piece 42.

At the abutting position of the stopper 44,
By immersing the piston rod 30 and bringing the contact surface 35a into contact with the stopper 44, the piston rod 30 is moved between the most extended state (maximum protruding position) and the most contracted state (immersed position). It can be positioned at a predetermined intermediate position (intermediate stroke position). That is, the piston rod 30 can be positioned at three positions: the maximum protruding position shown in FIG. 4, the retracted position shown in FIG. 6, and the intermediate stroke position shown in FIG.

The maximum protruding position, the retracted position, and the intermediate stroke position of the piston rod 30 correspond to the respective rotational positions of the pantograph mechanism 11. That is,
The maximum protruding position of the piston rod 30 corresponds to the open position farthest from the spinning frame 1 shown in FIG. The retracted position of the piston rod 30 corresponds to the closed position closest to the spinning frame 1 shown in FIG. The intermediate stroke position of the piston rod 30 is
This corresponds to the intermediate position located between the open position and the closed position shown in FIG.

Next, the operation and effect of the rotary positioning mechanism in the tube changing device of the spinning machine configured as described above will be described. As shown in FIG. 1, an empty bobbin E is attached to the peg 4a.
When the full bobbin F inserted into the spindle 3 is replaced with the empty bobbin E from the state where the full bobbin F is inserted into the spindle 3, first, as shown in FIG. The pantograph mechanism 11 is positioned at the closed position, the bobbin holding device 9 attached to the doffing bar 10 holds the empty bobbin E, and the empty bobbin E is pulled out from the peg 4a. next,
As shown in FIG. 7B, after rotating the pantograph mechanism 11 to the open position, the doffing bar 10 is raised. Then, as shown in FIG. 8A, after rotating the pantograph mechanism 11 to the intermediate position, the doffing bar 1
0 is lowered, the empty bobbin E is inserted into the intermediate peg 7, the empty bobbin E is inserted, and the holding state of the bobbin holding device 9 is released. Then, after raising the doffing bar 10 again, FIG.
As shown in (b), the pantograph mechanism 11 is rotated to the closed position to position the bobbin holding device 9 on the full bobbin F. After that, the doffing bar 10 is lowered, the full bobbin F is held by the bobbin holding device 9, and then the full bobbin F is pulled out from the spindle 3 by raising the doffing bar 10. Further, from this state, the pantograph mechanism 11 is rotated to the open position. Then, the doffing bar 10 is lowered, the pantograph mechanism 11 is rotated to the closed position, the full bobbin F is inserted into the peg 4a, and the holding state of the bobbin holding device 9 is released. Then, after rotating the pantograph mechanism 11 again to the open position, the intermediate peg 7
The pantograph mechanism 11 is rotated to an intermediate position in order to grip the empty bobbin E inserted in the empty bobbin E, and the empty bobbin E is pulled out from the intermediate peg 7. Then, as shown in FIG. 9, by rotating the pantograph mechanism 11 to the closed position and inserting the empty bobbin E into the spindle 3, the full bobbin F inserted into the spindle 3 is replaced with the empty bobbin E.

As shown in FIGS. 2 to 4, in the pipe changing device 8 which operates as described above, the pantograph mechanism 11 is rotated by the projecting and retracting operations of the piston rod 30 in the drive cylinder 29. That is, when the drive cylinder 29 is driven to cause the piston rod 30 to project or retract, the rotary levers 24 are simultaneously rotated based on the operation. That is, when the piston rod 30 of the drive cylinder 29 is projected, one end of the rotation lever 24 is rotated upward. For this reason, the link 26 moves upward, and the pantograph mechanism 11 rotates in a direction away from the spinning frame 1. Then, by disposing the piston rod 30 at the maximum protruding position, the pantograph mechanism 11
Is positioned in the open position.

When the piston rod 30 is retracted, one end of the rotation lever 24 is rotated downward. Therefore, the link 26 moves downward, and the pantograph mechanism 11 rotates in a direction approaching the spinning frame 1. Then, by disposing the piston rod 30 in the retracted position, the pantograph mechanism 11 is positioned in the closed position.

Next, the pantograph mechanism 11 of the pipe changing device 5
A case will be described where is rotated from the open position to the intermediate position to position at the intermediate position. Pantograph mechanism 1
When 1 is located in the open position, as shown in FIG. 4, the piston rod 30 of the drive cylinder 29 is located in the maximum protruding position. From this state, the stopper cylinder 3
8 is driven and the piston rod 39 is projected.
Then, in the bracket 41, the support portion 43 of the bracket 41 has the sliding surface 3
While sliding on 1a, it moves to the piston rod 30 side together with the stopper 44. Then, as shown in FIG.
When the projecting operation of the piston rod 39 is completed, the stopper 4
When 4 is arranged at the contact position, the detection sensor 40 detects the detection piece 42 of the bracket 41. At the same time when the detection sensor 40 detects the detection piece 42, the piston rod 30 of the drive cylinder 29 starts the retracting operation. The piston rod 30 is restrained from retracting when the contact surface 35a of the contact ring 35 contacts the tip of the stopper 44, and the piston rod 30 is positioned at the intermediate stroke position. That is, the pantograph mechanism 11 is positioned at the intermediate position.

When the pantograph mechanism 11 thus positioned at the intermediate position is arranged at the closed position, the piston rod 39 is retracted from the state shown in FIG. 5, and the support portion 43 of the bracket 41 slides on the sliding surface. While sliding on 31a, the stopper 44 is moved from the contact position to the retracted position. When the contact state between the stopper 44 and the contact surface 35a is released, the piston rod 30 of the drive cylinder 29 is retracted again, and when the retracting operation of the piston rod 30 is completed, the pantograph mechanism 11 is positioned at the closed position. .

Therefore, according to the present embodiment, the stopper 44
Has its axis parallel to the piston rod 30. Therefore, when the stopper 44 is arranged at the abutting position, the piston rod 30 is retracted, and the piston rod 30 is positioned at the intermediate stroke position, the force due to the retracting action is received by the stopper 44 in the axial direction, and The drive cylinder 29 receives it. Therefore, the bending of the stopper 44 can be surely prevented. Furthermore,
At the contact position, the axis of the stopper 44 is located within the width of the drive cylinder 29. Therefore, the force applied to the stopper 44 is transmitted to the drive cylinder 29 via the support portion 43 of the bracket 41 and the cylinder bracket 36.
Therefore, when the piston rod 30 is positioned at the intermediate stroke position, the bracket 41 and the cylinder bracket 36 are not subjected to an extra force such as bending themselves. Therefore, since the bracket 41 and the cylinder bracket 36 do not require high strength, it is possible to reduce the size and weight and further reduce the cost.

Similarly, when the piston rod 30 is positioned at the intermediate stroke position, no force acts on the stopper cylinder 38, so that the failure of the stopper cylinder 38 can be reduced. Further, it is possible to prevent various troubles in the ring spinning machine 1 due to the failure of the stopper cylinder 38.

Further, at the same time when the detection sensor 40 detects the detection piece 42, the immersing operation of the piston rod 30 into the intermediate stroke position is started. Therefore, the detection sensor 40 makes it possible to easily determine the timing of starting the operation of retracting the piston rod 30 to the intermediate stroke position, and prevent malfunction.

The present invention is not limited to the above-described embodiments, but may be implemented as follows with a part of the configuration appropriately changed without departing from the spirit of the invention. (1) In the above embodiment, the pipe changing device 8 and the like may be applied to the spinning machine base 1 in which only one side is arranged.

(2) In the above embodiments, the present invention is embodied in a ring spinning machine, but it may be embodied in a pipe changing device such as a ring twisting machine. (3) In the above embodiment, the stopper 44 is moved while sliding the support portion 43 of the bracket 41 on the sliding surface 31a formed on the cylinder bracket 31, but the stopper 4
The stopper 44 itself may be moved while sliding the sliding surface 31a by supporting the bracket 4 at the intermediate portion thereof.

The support portion 43 of the bracket 41 is not always required.
Need not be slid on the sliding surface 31a. For example, the bracket 41 is formed of an elastic member such as a leaf spring, and the abutment ring 35 of the piston rod 30 and the stopper 4 are formed.
The bracket 41 or the stopper 44 may abut on the sliding surface 31a only when abutting against the sliding surface 31 (at the intermediate stroke position).

Further, the stopper 44 may be directly attached to the piston rod 39 without using the bracket 41. At this time, the moving body is formed only by the piston rod 39.

(4) In the above embodiment, the stopper 44
The intermediate stroke position, that is, the intermediate position of the pantograph mechanism 11 may be appropriately changed by changing the axial length of the above according to the position of the intermediate peg 7. At this time, since it suffices to simply change the axial length of the stopper 44, the intermediate stroke position can be easily changed.

(5) In the above embodiment, the detection sensor 40 detects the detection piece 42, and at the same time, the stopper 44 starts moving from the retracted position to the contact position, but it may start after a predetermined time has elapsed.

(6) In the above embodiment, the stopper cylinder driven by air is used as the driving means for driving the stopper 44, but an electric cylinder or a linear motor may be used.

(7) In the above embodiment, the sliding surface 36a is formed over the entire width of the cylinder bracket 36, but the sliding surface 36a is formed only in the range in which the support portion 43 of the bracket 41 can slide. May be.

(8) In the above embodiment, the drive cylinder 2 corresponding to the open position and the closed position of the pantograph mechanism 11.
It is not necessary to set the position of the piston rod 30 of No. 9 to the stroke end of the drive cylinder 29 such as the maximum protruding position and the retracted position, and it may be set to an appropriate position within the stroke.

[0043]

As described in detail above, according to the present invention, an unreasonable force is exerted on the moving body of the drive means by the force generated by the contact between the contact portion provided on the piston rod of the drive cylinder and the stopper member. There is an excellent effect that it can be prevented from acting and the mounting bracket to which the drive means is attached can be downsized.

[Brief description of drawings]

FIG. 1 is a front view showing a spinning frame and a pipe changing device in an embodiment embodying the present invention.

FIG. 2 is a side view showing a pipe replacement device according to an embodiment.

FIG. 3 is a front view showing a transmission mechanism and a drive cylinder in one embodiment.

FIG. 4 is a plan view showing a transmission mechanism and a drive cylinder in one embodiment.

FIG. 5 is a plan view showing a drive cylinder in one embodiment.

FIG. 6 is a plan view showing a drive cylinder in one embodiment.

7 (a) and 7 (b) are schematic side views showing a state during pipe replacement work by a pantograph mechanism in one embodiment.

8 (a) and 8 (b) are schematic side views showing a state during pipe replacement work by a pantograph mechanism in one embodiment.

FIG. 9 is a schematic side view showing a state during pipe replacement work by the pantograph mechanism in one embodiment.

FIG. 10 is a plan view showing a conventional drive cylinder.

FIG. 11 is a plan view showing a conventional drive cylinder.

FIG. 12 is a plan view showing a conventional drive cylinder.

[Explanation of symbols]

8 ... Pipe changing device, 11 ... Pantograph mechanism, 20 ... Transmission mechanism, 29 ... Drive cylinder, 30 ... Piston rod, 36
... Cylinder bracket as mounting bracket, 35a
A contact surface serving as a contact portion, a stopper cylinder serving as a driving unit, a piston rod serving as a moving body, a bracket serving as a moving body, a stopper serving as a stopper member, and the like.

Claims (1)

[Claims] 1. A drive cylinder for rotating the entire pantograph mechanism provided in a pipe changing device of a spinning machine through expansion and contraction of a piston rod via a transmission mechanism. A drive means having a movable body which is movable in a direction substantially orthogonal to the axial direction of the piston rod through a mounting bracket is attached to the cylinder, and the movable body moves to the movable body to contact the piston rod. The stopper member is attached so that it can be arranged at a contact position where it can contact the contact portion and a retracted position where it cannot contact, and at the contact position, the stopper member is located between the contact portion and the drive cylinder. Rotational positioning mechanism in the tube changing device of the spinning machine sandwiched by.