CN110937470A - Bobbin replacing device of spinning frame - Google Patents

Abstract

The invention provides a bobbin replacing device of a spinning machine, which can restrain the height dimension of a machine table of the spinning machine to be small even if a bobbin supporting axis is not inclined relative to a vertical axis. The 2 nd bobbin supporting axis (J2) of the bobbin transfer part (21) and the 1 st bobbin supporting axis (J1) of the bobbin supporting part (22) are set to be displaced in the horizontal direction. In a state where the lifting axis (J4) of the pantograph mechanism (25) is arranged parallel to the vertical axis (J5), the angle formed by the gripping axis (J3) and the lifting axis is maintained at the 1 st angle, and the gripping axis and the 2 nd bobbin supporting axis are arranged coaxially. In addition, under the state that the lifting axis of the scaling mechanism is inclined relative to the 2 nd bobbin supporting axis by the inclining mechanism (26), the angle formed by the holding axis and the lifting axis is kept as the 2 nd angle, and the holding axis is arranged coaxially with the 1 st bobbin supporting axis.

Description

Bobbin replacing device of spinning frame

Technical Field

The invention relates to a bobbin replacing device of a spinning frame.

Background

In a ring spinning frame, a synchronous bobbin replacing device is often provided which performs an operation of simultaneously moving all the spindles among a plurality of spindles to replace bobbins attached to the spindles from full bobbins (hereinafter, also referred to as "full bobbins") to empty bobbins (hereinafter, also referred to as "empty bobbins"). As a technique related to a synchronous bobbin replacing device, for example, a technique described in patent document 1 is known.

Patent document 1 describes a synchronous bobbin replacing device including a pantograph mechanism for raising and lowering a doffing bar having a bobbin holding section, and a moving mechanism for moving the entire pantograph mechanism to a position close to a bed of a spinning machine and a position away from the bed by rotating the pantograph mechanism about a drive shaft.

In the synchronous bobbin exchanging device described in patent document 1, a bobbin transfer section for transferring bobbins by using a plurality of hook trays is disposed below a spindle guide provided with a plurality of spindles. In order to change the bobbin attached to the spindle from the full yarn bobbin to the empty yarn bobbin, the doffing lever is moved up and down by the retracting mechanism and rotated by the moving mechanism.

Specifically, first, the empty yarn bobbin attached to the hook tray is gripped by the bobbin gripping section by the lifting and lowering operation of the doffing lever by the retracting mechanism. At this time, the bobbin holding section moves in the vertical direction in accordance with the vertical movement of the doffing lever, and the empty yarn bobbin is held by the movement.

Then, the empty yarn bobbin held by the bobbin holding portion is attached to the intermediate hook by the lifting operation of the doffing lever by the retracting mechanism and the rotating operation of the retracting mechanism by the moving mechanism.

Then, after the full-yarn bobbin attached to the spindle is gripped by the bobbin gripping portion by the lifting operation of the doffing lever by the retracting mechanism, the full-yarn bobbin is attached to the hook tray by the lifting operation of the doffing lever by the retracting mechanism and the rotating operation of the retracting mechanism by the moving mechanism.

Next, after the empty yarn bobbin attached to the intermediate hook is gripped by the bobbin gripping section by the lifting operation of the doffing lever by the retracting mechanism and the turning operation of the retracting mechanism by the moving mechanism, the empty yarn bobbin is attached to the spindle by the lifting operation of the doffing lever by the retracting mechanism and the turning operation of the retracting mechanism by the moving mechanism. This enables the bobbin attached to the spindle to be replaced from the full yarn bobbin to the empty yarn bobbin.

Patent document 1: japanese laid-open patent publication No. 7-126930

However, the synchronous bobbin changer described in patent document 1 has a problem that the height dimension of the bed of the spinning machine increases. The reason for this is as follows.

First, when inserting and removing a bobbin into and from the hook tray of the bobbin transfer unit, the bobbin transfer unit may be moved in the vertical direction instead of moving the bobbin holding unit in the vertical direction by the vertical movement of the doffing lever by the pantograph mechanism. However, if the bobbin transfer section is moved in the vertical direction, a driving system for moving the entire bobbin transfer section in the vertical direction needs to be newly added. Therefore, the structure of the synchronous bobbin replacing device becomes complicated and large. Therefore, the bobbin is preferably inserted into and removed from the hook tray by the lifting operation of the doffing rod by the pantograph mechanism.

However, in order to insert and remove the bobbin into and from the hook tray by the lifting and lowering operation of the doffing lever by the pantograph mechanism, it is necessary to dispose the spindle and the hook tray so as to be largely separated from each other in the vertical direction and to dispose the bobbin support axis of the spindle and the bobbin support axis of the hook tray coaxially with each other. In addition, in both cases of inserting and removing the bobbin to/from the spindle and inserting and removing the bobbin to/from the hook tray, the bobbin gripping portion needs to be moved in the vertical direction. Therefore, it is necessary to secure not only the long side dimension of the bobbin but also an operation space for inserting and removing the bobbin above the spindle and above the hook tray. Therefore, the height of the machine table of the spinning machine is increased.

The above-described operation space is a space required for moving the bobbin holding section in the vertical direction by the lifting and lowering operation of the doffing bar by the pantograph mechanism. The bobbin supporting axis is a virtual axis set in a portion where the bobbin is attached in an insertable/removable state, such as the spindle and the hook tray described above. The bobbin is supported by the spindle and the hook tray with the bobbin supporting axis as the center. In the synchronous bobbin changer described in patent document 1, both the bobbin supporting axis of the spindle and the bobbin supporting axis of the hook tray are parallel to the vertical shaft. The vertical axis described in the present specification refers to an axis parallel to the direction of gravity.

As a means for suppressing the height dimension of the bed of the spinning machine to a low level, for example, it is conceivable to incline either or both of the bobbin support axis of the spindle and the bobbin support axis of the hook tray with respect to the vertical axis. However, if the bobbin supporting axis of the spindle is inclined, gravity acts obliquely on the spindle and the bobbin when the bobbin is rotated by the spindle, and the rotation of the spindle and the bobbin becomes unstable under the influence of the gravity. In addition, if the bobbin supporting axis of the hook tray is inclined, the bobbin may be detached from the hook tray when the bobbin is transferred by the bobbin transfer unit. In addition, in the winding device that receives the full bobbin from the bobbin transfer section, which ends the yarn rewinding in the spinning machine, the device configuration needs to be changed greatly in accordance with the inclination of the bobbin supporting axis of the hook tray.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object thereof is to provide a bobbin replacing device for a spinning machine, which can suppress the height dimension of a bed of the spinning machine to be small even if a bobbin supporting axis is not inclined with respect to a vertical axis.

The bobbin replacing device of the spinning frame of the invention comprises: a bobbin supporting part which supports the bobbin with the 1 st bobbin supporting axis parallel to the vertical axis as the center; a bobbin transfer unit for supporting a bobbin around a 2 nd bobbin supporting axis which is set to be displaced from the 1 st bobbin supporting axis in a horizontal direction; a bobbin holding section for holding a bobbin around a holding axis; a bobbin drop lever for supporting the bobbin holding part; a lifting mechanism for lifting the doffing rod in a direction parallel to a lifting axis; and a tilting mechanism for tilting the entire lifting mechanism with respect to the vertical axis, wherein a support mechanism for supporting the bobbin gripping part via the doffing rod is provided between the lifting mechanism and the doffing rod, the support mechanism has an attitude changing mechanism capable of changing an attitude of the bobbin gripping part so that an angle formed by the gripping axis and the lifting axis can be at least 2 different angles, the support mechanism maintains an angle formed by the gripping axis and the lifting axis at a 1 st angle in a state where the lifting axis and the 2 nd bobbin support axis are arranged in parallel, and maintains an angle formed by the gripping axis and the lifting axis at a 2 nd angle larger than the 1 st angle in a state where the lifting axis of the lifting mechanism is tilted with respect to the 2 nd bobbin support axis by the tilting mechanism, the holding axis line and the 2 nd bobbin supporting axis line are arranged coaxially with each other in a state where the supporting mechanism holds the angle formed by the holding axis line and the lifting axis line at the 1 st angle, and the holding axis line and the 1 st bobbin supporting axis line are arranged coaxially with each other in a state where the supporting mechanism holds the angle formed by the holding axis line and the lifting axis line at the 2 nd angle.

In the bobbin replacing device for a spinning machine according to the present invention, the supporting mechanism may include a fixed member fixed to the elevating mechanism and a movable member attached to the fixed member, and the bobbin holding section may be attached to the movable member via the doffing lever.

In the bobbin replacing device for a spinning machine according to the present invention, the movable member may be provided with a contact portion and a stopper member fixed to a frame of the spinning machine in correspondence with the contact portion, and the support mechanism may be configured to hold the angle formed by the grip axis and the lift axis at the 2 nd angle by the contact portion contacting the stopper member in a state where the lift axis of the lift mechanism is tilted with respect to the 2 nd bobbin support axis by the tilt mechanism.

In the bobbin replacing device for a spinning machine according to the present invention, the support mechanism may hold the angle formed by the grip axis and the lift axis at the 1 st angle by the weight of the bobbin grip and the doffing lever.

In the bobbin replacing device for a spinning machine according to the present invention, the support mechanism may hold the angle formed by the gripping axis and the lifting axis at the 1 st angle by an elastic force.

In the bobbin replacing device for a spinning machine according to the present invention, the support mechanism may hold the angle formed by the grip axis and the elevation axis at the 1 st angle by a magnetic force.

In the bobbin replacing device for a spinning machine according to the present invention, the support mechanism may include an adjustment member capable of adjusting an amount of change in the posture of the bobbin holding section by the posture change mechanism.

In the bobbin changer for a spinning machine according to the present invention, the spinning machine may be a centrifugal spinning machine.

According to the present invention, the height of the bed of the spinning machine can be reduced without inclining the bobbin supporting axis with respect to the vertical axis.

Drawings

Fig. 1 is a side view showing an example of a structure of a bobbin changer of a spinning machine according to an embodiment of the present invention.

Fig. 2 is a front view showing an example of the structure of a bobbin changer of a spinning machine according to an embodiment of the present invention.

Fig. 3 is a perspective view showing an example of the structure of a bobbin changer of a spinning machine according to an embodiment of the present invention.

Fig. 4 is a diagram showing a structure of the bobbin transfer section.

Fig. 5 is a view showing a state in which the hook tray and the intermediate hook are arranged in the longitudinal direction of the spinning machine.

Fig. 6 is a view showing a structure of the bobbin supporting portion.

Fig. 7 is a side view showing the arrangement state of the respective portions before the scaling mechanism is tilted.

Fig. 8 is a side view showing the arrangement state of the respective portions after the pantograph mechanism is tilted.

Fig. 9 is a perspective view of the mounting state of the pantograph mechanism, the doffer rod, and the support mechanism as viewed from the front side.

Fig. 10 is a perspective view of the mounting state of the pantograph mechanism, the doffer rod, and the support mechanism as viewed from the frame side.

Fig. 11 is a partial sectional view showing a state of the support mechanism when the pantograph mechanism is vertically erected.

Fig. 12 is a partial sectional view showing a state of the support mechanism when the pantograph mechanism is tilted obliquely.

Fig. 13 is a side view showing an example in which a spring member is provided in the support mechanism.

Fig. 14 is a side view showing an example in which a magnet is provided in the support mechanism.

Fig. 15 is a side view illustrating another example of the posture changing mechanism.

Fig. 16 is a side view illustrating another example of the posture changing mechanism.

Description of reference numerals

10 … centrifugal spinning machine; 11 … a frame; 20 … bobbin changing device; 21 … bobbin transfer part; 22 … bobbin support; 23 … bobbin grips; 24 … doffer bar; 25 … pantograph mechanism (elevator mechanism); 26 … tilting mechanism; 27 … support means; 30 … bobbins; 42 … drive shaft; 61 … posture changing mechanism; 62 … securing element; 63 … a movable member; 69 … adjusting screw (adjusting part); 71 … abutment; 75 … a stop member; 77 … spring member (elastic member); 78a, 78b … magnet; j1 … 1 st bobbin support axis; j2 … No. 2 bobbin support axis; j3 … grip axis; j4 … lifting axis; j5 … vertical axis.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a side view showing an example of a structure of a bobbin changer of a spinning machine according to an embodiment of the present invention, fig. 2 is a front view thereof, and fig. 3 is a perspective view thereof. In the present embodiment, a case where the spinning machine is a centrifugal spinning machine will be described as an example.

As shown in fig. 1, a plurality of fixed covers 12 are provided on both sides of a frame 11 of a centrifugal spinning machine 10. In order to reduce the height of the bed of the centrifugal spinning machine 10, it is effective to reduce the height of the frame 11. As shown in fig. 2, the plurality of stationary covers 12 are arranged side by side in the longitudinal direction X of the spinning machine. The fixed cover 12 is formed in a cylindrical shape. A tank, not shown, is housed inside the fixed cover 12. The centrifugal spinning machine 10 includes a plurality of spindles on both sides of a frame 11. The spindle becomes a unit of spinning. A fixed cover 12 and a tank are provided for each spindle. In addition to the fixing cover 12 and the can, a draft device, a suction pipe, a yarn guide tube, and the like, which are not shown, are provided in one spindle.

Here, the basic operation of the centrifugal spinning machine 10 will be briefly described.

First, in the centrifugal type spinning machine 10, the yarn drawn by the draft device is supplied to the guide tube through the suction tube, and is introduced into the can through the guide tube. Then, the yarn is twisted by the rotation of the pot while being discharged from the lower end of the yarn guide tube, and the yarn is stacked on the inner wall of the pot. At this time, the yarn guide tube is repeatedly reciprocated in the vertical direction at a predetermined cycle, and the position of the yarn guide tube is gradually displaced downward. Thus, a yarn cake as a laminate of yarns is formed on the inner wall of the can. Then, while the rotation of the tank is kept, a bobbin is inserted into the tank, and the yarn forming the yarn cake is rewound onto the bobbin. Then, the bobbin full of the yarn wound by a predetermined amount by rewinding the yarn is taken out of the tank.

In the centrifugal spinning machine 10 operated in this manner, the bobbin changer 20 performs an operation of changing the full yarn bobbin and the empty yarn bobbin. The bobbin replacing device 20 is disposed corresponding to the plurality of spindles and is disposed in pairs on both sides of the frame 11. The bobbin replacing device 20 constitutes a synchronous bobbin replacing device for performing replacement of bobbins synchronously with respect to a plurality of spindles provided in the centrifugal spinning machine 10.

The bobbin replacing device 20 includes: a bobbin transfer section 21 that transfers a bobbin, a bobbin support section 22 that supports a bobbin, a bobbin gripping section 23 that grips a bobbin, a doffing lever 24 that supports the bobbin gripping section 23, a retraction mechanism 25 that is an elevating mechanism, a tilting mechanism 26 that tilts the entire retraction mechanism 25, and a support mechanism 27 that supports the bobbin gripping section 23 via the doffing lever 24.

(bobbin transfer part)

The bobbin transfer section 21 transfers bobbins for loading of empty bobbins and unloading of full bobbins to/from the centrifugal type spinning machine 10 including a plurality of spindles. As shown in fig. 4, the bobbin transfer section 21 has a hook tray 31, and the bobbin 30 is transferred using the hook tray 31. The hook tray 31 integrally has a protruding hook 31 a. The hook tray 31 and the hook 31a are each formed in a circular shape in plan view. The bobbin 30 is configured to be inserted into and removed from the hook 31a of the hook tray 31. The hook tray 31 supports the bobbin 30 around a 2 nd bobbin support axis J2 passing through the axial center of the hook 31 a. At this time, the center axis of the bobbin 30 supported by the hook tray 31 is arranged coaxially with the 2 nd bobbin support axis J2. The 2 nd bobbin support axis J2 is an imaginary axis parallel to the vertical axis J5, and the vertical axis J5 is an imaginary axis parallel to the direction of gravity. Therefore, in the bobbin transfer section 21, the bobbin 30 is supported by the hook tray 31 in a vertically standing state.

The hook tray 31 is disposed in plural in a hook tray passage formed in the guide member 32. The guide member 32 is formed in a rail shape elongated in the longitudinal direction X of the spinning machine. The plurality of hook trays 31 are arranged at a constant pitch in the long side direction X of the spinning frame. The pitch of the hook tray 31 is set to be the same as the pitch of the plurality of cans arranged in the long side direction X of the spinning frame.

The bobbin transfer unit 21 transfers the bobbin 30 attached to each hook tray 31 together with the hook tray 31. As shown in fig. 5, a plurality of hook trays 31 are arranged adjacent to each other in the longitudinal direction X of the spinning machine. Further, one intermediate hook 33 is disposed at each boundary portion of 2 hook trays 31 adjacent to each other in the longitudinal direction X of the spinning machine. The intermediate hook 33 is used to temporarily retract an empty yarn bobbin in advance when the bobbin replacing device 20 performs a bobbin replacing operation. Here, a pitch Pa between 2 hooks 31a adjacent to each other in the longitudinal direction X of the spinning machine is set to a half of the pitch Pa from one hook 31a to the intermediate hook 33 adjacent thereto. That is, the intermediate hook 33 is disposed at an intermediate position between 2 hooks 31a adjacent to each other in the longitudinal direction X of the spinning frame.

(bobbin supporting part)

The bobbin support section 22 supports the bobbin 30 used for rewinding the yarn when the centrifugal type fine spinning machine 10 performs fine spinning. The bobbin supporting section 22 supports a full yarn bobbin serving as a bobbin before replacement and an empty yarn bobbin serving as a bobbin after replacement at different timings when the bobbin replacing device 20 performs a bobbin replacing operation. Thus, the bobbin supporting portion 22 is a component of both the centrifugal type spinning machine 10 and the bobbin changer 20.

The bobbin supporting section 22 supports the bobbin 30 in a 1-to-1 correspondence with the can provided for each spindle. The bobbin support portion 22 has a bobbin guide rail 36, and the bobbin 30 is supported vertically on the bobbin guide rail 36. As shown in fig. 6, the bobbin rail 36 is provided with a support pin 37. The support pin 37 is formed in a circular shape in plan view. The support pin 37 stands upright from the upper surface of the bobbin rail 36. The bobbin 30 is configured to be insertable into and removable from the support pin 37. The bobbin guide 36 supports the bobbin 30 about the 1 st bobbin support axis J1 passing through the shaft core of the support pin 37. At this time, the center axis of the bobbin 30 supported by the bobbin rail 36 is arranged coaxially with the 1 st bobbin support axis J1. Therefore, the bobbin 30 is supported by the bobbin guide rail 36 in the bobbin support portion 22 in a vertically standing state.

The 1 st bobbin support axis J1 is an imaginary axis parallel to the vertical axis J5. Therefore, the 2 nd bobbin support axis J2 and the 1 st bobbin support axis J1 are parallel to each other. However, the 2 nd bobbin support axis J2 and the 1 st bobbin support axis J1 are set to be horizontally displaced from each other. Specifically, the 2 nd bobbin support axis J2 and the 1 st bobbin support axis J1 are set to be displaced in the short direction Y of the spinning frame orthogonal to the long direction X of the spinning frame. Further, in the short side direction Y of the spinning machine, the 2 nd bobbin supporting axis J2 is set further from the frame 11 than the 1 st bobbin supporting axis J1.

The bobbin supporting portion 22 is provided to be movable in the vertical direction by the lifting device 38. The lifting device 38 moves the bobbin support 22 upward from the initial position in order to rewind the yarn to the bobbin 30 inside the tank. Further, the lifting device 38 moves the bobbin support portion 22 downward to return to the initial position in order to take out the bobbin 30 in which the yarn is rewound inside the can. In a state where the bobbin supporting portion 22 is arranged at the initial position, a predetermined height difference H is set between the bobbin transfer portion 21 and the bobbin supporting portion 22 (see fig. 1). The height difference H is set shorter than the length dimension of the bobbin 30. Therefore, the lower end of the bobbin 30 supported by the bobbin supporting portion 22 is arranged at a position lower than the upper end of the bobbin 30 supported by the bobbin receiving and conveying portion 21. Therefore, the bobbin 30 supported by the bobbin supporting portion 22 and the bobbin 30 supported by the bobbin transfer portion 21 are arranged to partially share a space in the height direction of the frame 11.

In this case, in the present embodiment, the 1 st bobbin support axis J1 and the 2 nd bobbin support axis J2 are arranged to be displaced in the horizontal direction, and therefore the bobbins 30 supported about the respective axes J1 and J2 do not interfere with each other. In contrast, for example, when the 1 st bobbin support axis J1 and the 2 nd bobbin support axis J2 are arranged coaxially, the height difference between the bobbin transfer section 21 and the bobbin support section 22 needs to be secured to be at least the length of the bobbin 30 so that the bobbins 30 supported about the respective axes J1 and J2 do not interfere with each other. Therefore, according to the present embodiment, the height dimension of the frame 11 can be suppressed to be small as compared with the case where the 1 st bobbin support axis J1 and the 2 nd bobbin support axis J2 are arranged coaxially.

(bobbin holding part)

The bobbin holding section 23 holds the bobbin 30 at the time of replacement of the bobbin. The bobbin grasping unit 23 has a bobbin insertion hole (not shown) into which the upper end of the bobbin 30 can be inserted, and grasps the bobbin 30 about a grasping axis J3 (see fig. 1) passing through the bobbin insertion hole. The grip axis J3 is an imaginary axis. In a state where the bobbin 30 is gripped by the bobbin grip 23, the center axis of the bobbin 30 is arranged coaxially with the grip axis J3.

The bobbin holding section described in japanese patent application laid-open No. 9-87931 can be applied to the bobbin holding section 23, for example. The bobbin gripping section disclosed in this publication includes a fixed gripping member, a movable gripping member, a diaphragm, and a biasing mechanism. In this bobbin gripping portion, the movable gripping member is moved from the release position to the gripping position by applying fluid pressure to the movable gripping member through the diaphragm, and the bobbin is gripped between the fixed gripping member and the movable gripping member. In the bobbin holding section, the action of the fluid pressure on the diaphragm is released, and the movable holding member is moved to the release position by the biasing mechanism, thereby releasing the holding of the bobbin.

(doffing rod)

As shown in fig. 2, the doffer bar 24 is a member extending long in the longitudinal direction X of the spinning machine, and is horizontally arranged. The doffer rod 24 is driven by the retracting mechanism 25 to move up and down while maintaining a horizontal posture. A plurality of bobbin gripping portions 23 are arranged in the longitudinal direction of the doffing bar 24 so as to correspond to the pair 1 of cans 1 of each spindle. Each bobbin grip 23 is attached to the bobbin drop rod 24 by screwing or the like. Thereby, the plurality of bobbin gripping sections 23 are supported by the bobbin drop rod 24.

(scaling mechanism)

The pantograph mechanism 25 elevates the drop tube lever 24 in the direction of the elevation axis J4 (see fig. 1 and 2). The lift axis J4 is an imaginary axis. When the elevation axis J4 is parallel to the vertical axis J5, the drop tube lever 24 is elevated in the direction parallel to the elevation axis J4, i.e., in the vertical direction. The pantograph mechanism 25 is supported to be rotatable about the drive shaft 42. The drive shaft 42 is disposed horizontally along the longitudinal direction X of the spinning frame. The drive shaft 42 is configured to be capable of reciprocating in the longitudinal direction X of the spinning frame by driving a cylinder, not shown.

The pantograph mechanism 25 includes a 1 st link 43 and a 2 nd link 44. One end of the 1 st link 43 is coupled to the fixing member 62 by a coupling pin 45. The doffer bar 24 is attached to the fixing member 62. The 1 st link 43 and the 2 nd link 44 are provided in plurality at a predetermined interval in the longitudinal direction X of the spinning machine. The doffing bar 24 is horizontally arranged between the upper ends of the 21 st links 43 adjacent to each other in the longitudinal direction X of the spinning machine. The other end of the 1 st link 43 is coupled to a moving bracket 47 by a coupling pin 46. The coupling pins 45 and 46 form link nodes of the pantograph mechanism 25, respectively. The lift axis J4 is an axis connecting the link node formed by the connecting pin 45 and the link node formed by the connecting pin 46. The moving bracket 47 is fixed to the drive shaft 42 so as to move in the longitudinal direction X of the spinning frame integrally with the drive shaft 42.

The 2 nd link 44 is a link having a length of 1/2 of the 1 st link 43. One end portion of the 2 nd link 44 is connected to a longitudinal intermediate portion of the 1 st link 43 by a connecting pin 48. The other end of the 2 nd link 44 is coupled to the support bracket 50 by a coupling pin 49. The coupling pins 48 and 49 form link nodes of the pantograph mechanism 25, respectively. The support bracket 50 is restricted from moving in the axial direction of the drive shaft 42 by a fixing bracket 51. The support bracket 50 is rotatably attached to the drive shaft 42 in a state where the drive shaft 42 is allowed to move in the longitudinal direction X of the spinning machine.

In the pantograph mechanism 25 configured as described above, when the drive shaft 42 is reciprocated in the longitudinal direction X of the spinning frame by driving of the not-shown power cylinder, the doffing lever 24 is lifted and lowered in accordance with the movement of the 1 st link 43 and the 2 nd link 44. When the doffing lever 24 is moved up and down, the bobbin gripping section 23 is also moved up and down together with the doffing lever 24.

(tilting mechanism)

The tilt mechanism 26 tilts the entire pantograph mechanism 25 with respect to the vertical axis J5. By tilting the pantograph mechanism 25 by the tilting mechanism 26, the elevation axis J4 of the pantograph mechanism 25 can be tilted with respect to the 2 nd bobbin support axis J2. The tilt mechanism 26 has the drive shaft 42, and rotates the pantograph mechanism 25 about the drive shaft 42 to tilt the entire pantograph mechanism 25. Therefore, the drive shaft 42 serves as a rotation fulcrum when the tilt mechanism 26 tilts the pantograph mechanism 25. When the pantograph mechanism 25 is pivoted by the tilting mechanism 26, the bobbin grasping portion 23 and the bobbin drop lever 24 move in a direction approaching or separating from the frame 11.

Specifically, when the pantograph mechanism 25 is rotated clockwise in the figure about the drive shaft 42 from a state where the elevation axis J4 of the pantograph mechanism 25 is vertically raised as shown in fig. 7, the bobbin grasping portion 23 and the bobbin drop rod 24 move in a direction approaching the frame 11. The operation of the tilt mechanism 26 at this time is an operation of tilting the pantograph mechanism 25 with respect to the vertical axis J5 (hereinafter referred to as "1 st tilting operation"). On the other hand, when the pantograph mechanism 25 is rotated counterclockwise CCW in the figure about the drive shaft 42 from a state where the elevation axis J4 of the pantograph mechanism 25 is inclined with respect to the vertical axis J5 as shown in fig. 8, the bobbin holding part 23 and the bobbin drop lever 24 move in a direction away from the frame 11. The operation of the tilt mechanism 26 at this time is an operation of canceling the tilt of the pantograph mechanism 25 with respect to the vertical axis J5 (hereinafter referred to as "2 nd tilt operation").

As the structure of the tilt mechanism 26, for example, the structure disclosed in the above-mentioned patent document 1 (japanese patent application laid-open No. 7-126930) can be adopted. That is, the rod 50a provided integrally with the support bracket 50 is rotated about the drive shaft 42 by driving of a power cylinder, not shown, and thereby the entire pantograph mechanism 25 is rotated about the drive shaft 42 together with the support bracket 50. The tilt mechanism 26 is not limited to the one disclosed in patent document 1, and may be any mechanism that can rotate the entire pantograph mechanism 25 about the drive shaft 42.

(supporting mechanism)

The support mechanism 27 is provided between the retraction mechanism 25 and the doffing lever 24, and supports the bobbin grasping portion 23 via the doffing lever 24. The support mechanism 27 includes a posture changing mechanism 61 for changing the posture of the bobbin grasping portion 23 so that the angle formed by the grasping axis J3 of the bobbin grasping portion 23 and the lifting axis J4 of the retracting mechanism 25 can be at least 2 different angles. The posture changing mechanism 61 is configured using a hinge 66. The posture of the bobbin grasping portion 23 is defined by the angle formed by the grasping axis J3 and the ascent and descent axis J4, and the posture of the bobbin grasping portion 23 changes due to this change in angle.

Fig. 9 is a perspective view of the mounting state of the pantograph mechanism, the doffer rod, and the support mechanism as viewed from the front side, and fig. 10 is a perspective view of the mounting state of the pantograph mechanism, the doffer rod, and the support mechanism as viewed from the frame side. Fig. 11 is a partial cross-sectional view showing a state of the support mechanism when the pantograph mechanism is vertically raised, and fig. 12 is a partial cross-sectional view showing a state of the support mechanism when the pantograph mechanism is tilted.

The support mechanism 27 includes a fixed member 62 and a movable member 63. The fixing member 62 is a member fixed with respect to the pantograph mechanism 25. The fixing member 62 is formed with a groove 64. The upper end of the 1 st link 43 is inserted into the groove 64. The upper end of the 1 st link 43 is coupled to the fixing member 62 by the coupling pin 45 in a state of being inserted into the recess 64. Further, a projection 65 is provided on the upper portion of the fixing member 62. The protrusion 65 is formed integrally with the fixing member 62.

The movable member 63 is connected to the fixed member 62 by a hinge 66. The hinge 66 includes a shaft portion 66a and a pair of wing portions 66b and 66c that are rotatable about the shaft portion 66 a. The shaft portion 66a is disposed parallel to the drive shaft 42. One of the wing portions 66b is fixed to the lower surface of the fixing member 62 by a screw 67 a. The other wing 66c is fixed to the lower surface of the movable member 63 by a screw 67 b. Thereby, the movable member 63 is supported to be rotatable about the shaft portion 66a of the hinge 66 with respect to the fixed member 62. The doffer rod 24 is attached to the movable member 63 by screwing or the like. Therefore, when the movable member 63 rotates about the shaft portion 66a of the hinge 66, the angle formed by the gripping axis J3 and the vertical movement axis J4 changes, and the posture of the bobbin gripping section 23 changes in accordance with the change.

A hook 68 is formed on the movable member 63. The hook 68 is formed corresponding to the protrusion 65 of the fixing member 62. Further, an adjustment screw 69 is attached to the movable member 63 at a position facing the hook portion 68. The adjustment screw 69 is attached to a screw hole 70 formed in the movable member 63. The adjustment screw 69 corresponds to an adjustment member for adjusting the amount of change in the posture of the bobbin grasping portion 23 by the posture changing mechanism 61. In the present embodiment, the adjustment screw 69 is, for example, a socket head cap screw. The tip of the adjustment screw 69 projects from the surface of the movable member 63 by a predetermined amount. The projecting amount of the adjustment screw 69 can be adjusted by rotating the adjustment screw 69 itself. When the posture of the bobbin holding section 23 is changed by the posture changing mechanism 61, the tip end portion of the adjusting screw 69 is a portion that comes into contact with the projection 65 of the fixing member 62. Therefore, the amount of change in the posture of the bobbin grasping portion 23 can be adjusted by adjusting the amount of projection of the adjustment screw 69. The adjustment of the amount of posture change of the bobbin holding section 23 using the adjustment screw 69 is an effective means for aligning the holding axis J3 with respect to the 1 st bobbin supporting axis J1 accurately and disposing the two axes coaxially when the posture of the bobbin holding section 23 is changed by the posture changing mechanism 61.

Further, the movable member 63 is provided with an abutting portion 71. The contact portion 71 may be formed integrally with the movable member 63, or may be formed separately from the movable member 63. In the present embodiment, the contact portion 71 is fixed to the upper portion of the movable member 63 by screwing or the like, for example. The contact portion 71 is formed in a half-moon shape in side view, and is disposed so as to protrude toward the fixed cover 12 side.

On the other hand, a stopper member 75 is fixed to the frame 11. The stopper member 75 is attached to the frame 11 as one component of the bobbin changer 20 and is disposed so as to surround any one of the fixed covers 12. The stopper member 75 is mounted with respect to the frame 11 by screwing or the like. The stopper member 75 is disposed so as to face the contact portion 71 of the movable member 63 in the short direction Y of the spinning machine. Thus, when the posture of the bobbin holding section 23 is changed by the posture changing mechanism 61, the entire retraction mechanism 25 is tilted by the tilting mechanism 26, and the contact portion 71 of the movable member 63 comes into contact with the stopper member 75.

Further, a bobbin grasping portion 23 is attached to the movable member 63 via a bobbin dropping lever 24. When viewed from the position of the shaft portion 66a of the hinge 66, the doffing lever 24 and the bobbin holding portion 23 are arranged so as to be biased in one direction, and thus the center of gravity of the entire mechanism including the movable member 63, the doffing lever 24, and the bobbin holding portion 23 is biased in this direction. Therefore, the movable member 63 receives a rotational force F1 in the clockwise direction in fig. 11 due to the self-weight of the bobbin grasping portion 23 and the bobbin drop lever 24, and the hook portion 68 of the movable member 63 is brought into contact with the protrusion 65 of the fixed member 62 by the rotational force F1.

As shown in fig. 7, the support mechanism 27 configured as described above maintains the angle formed by the grip axis J3 and the lifting axis J4 at the 1 st angle equal to the angle θ 1 in a state where the lifting axis J4 of the pantograph mechanism 25 is arranged parallel to the 2 nd bobbin support axis J2. The elevation axis J4 is an angle formed by the vertical axis J5, and since the 2 nd bobbin supporting axis J2 is vertical, the angle θ 1 is equal to the angle formed by the elevation axis J4 and the 2 nd bobbin supporting axis J2. In a state where the elevation axis J4 of the pantograph mechanism 25 is arranged in parallel with the 2 nd bobbin support axis J2, θ 1 is 0 °.

As shown in fig. 8, in a state where the tilt mechanism 26 tilts the elevation axis J4 of the pantograph mechanism 25 with respect to the 2 nd bobbin support axis J2, the support mechanism 27 holds the angle formed by the grip axis J3 and the elevation axis J4 at the 2 nd angle equal to the angle θ 2. The angle θ 2 is an angle formed by the ascent and descent axis J4 and the vertical axis J5, and since the 1 st bobbin support axis J1 is vertical, the angle θ 2 and the ascent and descent axis J4 are equal to the angle formed by the 1 st bobbin support axis J1. In a state where the elevation axis J4 of the pantograph mechanism 25 is inclined with respect to the 2 nd bobbin support axis J2, the angle θ 2 is larger than the above-described angle θ 1.

The following description will be made in detail.

First, in a state where the ascent and descent axis J4 of the pantograph mechanism 25 is arranged in parallel with the 2 nd bobbin support axis J2, the movable member 63 receives the clockwise rotational force F1 in fig. 11 due to the own weight of the bobbin grasping portion 23 and the bobbin drop lever 24. The hook 68 of the movable member 63 comes into contact with the protrusion 65 of the fixed member 62 by the rotational force F1. Thereby, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 1 st angle, which is the same as the angle θ 1 (see fig. 7). At this time, the grip axis J3 is arranged parallel to the 2 nd bobbin support axis J2. Therefore, the 1 st angle is kept at 0 °. In this way, the gripping axis J3 and the 2 nd bobbin supporting axis J2 are coaxially arranged in the state of being held at the 1 st angle. The term "coaxially arranged" means that 2 shafts are arranged on the same axis. The reason why the gripping axis J3 is arranged coaxially with the 2 nd bobbin support axis J2 is that the bobbin 30 supported by the bobbin transfer unit 21 about the 2 nd bobbin support axis J2 can be gripped by the bobbin gripping unit 23.

On the other hand, when the entire pantograph mechanism 25 is tilted by the tilt mechanism 26, as shown in fig. 12, the contact portion 71 of the movable member 63 comes into contact with the stopper member 75. At this time, the movable member 63 receives the reaction force F2 resulting from the abutment of the abutment portion 71 and the stopper member 75, and rotates counterclockwise in fig. 12 about the shaft portion 66a of the hinge 66. When the movable member 63 is rotated in this manner, the hook 68 is separated from the projection 65, and the tip of the adjustment screw 69 abuts against the projection 65. Thereby, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 2 nd angle, which is the same as the angle θ 2 (see fig. 8). When the pantograph mechanism 25 is tilted with respect to the 2 nd bobbin support axis J2, the elevation axis J4 is tilted together with the pantograph mechanism 25. At this time, the gripping axis J3 is tilted by the angle θ 2 in the direction opposite to the tilt direction of the ascent and descent axis J4 with respect to the ascent and descent axis J4 by the rotation of the movable member 63 described above. Therefore, even if the ascent and descent axis J4 is inclined with respect to the 2 nd bobbin support axis J2, the gripping axis J3 is arranged parallel to the 1 st bobbin support axis J1 and the 2 nd bobbin support axis J2. In addition, since the elevation axis J4 is inclined with respect to the vertical axis J5, the 2 nd angle is maintained at an angle larger than 0 °. In this way, the gripping axis J3 is arranged coaxially with the 1 st bobbin supporting axis J1 while maintaining the 2 nd angle. The reason why the gripping axis J3 is arranged coaxially with the 1 st bobbin supporting axis J1 is that the bobbin 30 supported by the bobbin supporting portion 22 about the 1 st bobbin supporting axis J1 can be gripped by the bobbin gripping portion 23.

Next, a description will be given of a procedure of the bobbin replacing operation using the bobbin replacing device 20 configured as described above.

First, in each spindle of the centrifugal type spinning machine 10, the bobbin support portion 22 is moved upward by the lifting device 38, and the bobbin 30 supported by the bobbin support portion 22 is inserted into the can, so that the yarn is rewound on the bobbin 30. On the other hand, the bobbin changer 20 starts to operate before the yarn is rewound onto the bobbin 30 and ends inside the tank, and operates as follows.

(1 st step)

First, the empty bobbins 30 are transferred to positions corresponding to the respective spindles by the bobbin transfer unit 21. At this time, the bobbin 30 is attached to the hook 31a of the hook tray 31 and transferred. The 2 nd bobbin support axis J2 of the bobbin transfer unit 21 is arranged coaxially with the grip axis J3 of the bobbin grip unit 23. Therefore, the empty bobbin 30 is disposed directly below the bobbin grasping portion 23.

(step 2)

Next, the doffer rod 24 is lowered by the pantograph mechanism 25. At this stage, the lifting axis J4 of the scaling mechanism 25 is arranged parallel to the 2 nd bobbin support axis J2. Therefore, the bobbin drop lever 24 descends straight along the 2 nd bobbin support axis J2 together with the bobbin grasping portion 23.

(step 3)

Next, the empty bobbin 30 transferred by the bobbin transfer unit 21 is gripped by the bobbin gripping unit 23 as described above.

(step 4)

Next, the winding bar 24 is lifted by the pantograph mechanism 25. The bobbin holding section 23 thus rises together with the bobbin drop lever 24 while holding the empty bobbin 30. As a result, the bobbin 30 is pulled out from the hook tray 31 of the bobbin transfer unit 21.

(step 5)

Next, the bobbin transfer section 21 moves the position of the hook tray 31 by a half pitch Pb in one direction of the longitudinal direction X of the spinning machine (see fig. 5). Thus, the intermediate hook 33 is disposed immediately below the bobbin holding section 23.

(step 6)

Next, after the bobbin dropping lever 24 is lowered by the retracting mechanism 25, the bobbin 30 is released from being gripped by the bobbin gripping section 23. Thereby, the empty bobbin 30 is attached to the intermediate hook 33.

(step 7)

Next, after the doffer rod 24 is raised by the pantograph mechanism 25, the bobbin transfer section 21 moves the position of the hook tray 31 by a half pitch Pb in the other direction of the longitudinal direction X of the spinning machine (see fig. 5). Thus, the hook 31a of the hook tray 31 is disposed directly below the bobbin grip 23.

Thereafter, the bobbin changer 20 waits until completion when the rewinding of the yarn into the bobbin 30 is not completed in the tank.

(step 8)

Next, when the yarn is completely rewound into the bobbin 30 in the tank, the bobbin supporting portion 22 is moved downward by the lifting device 38. Thereby, the bobbin 30 with the full bobbin after completion of the yarn rewinding is taken out from the tank.

(9 th step)

Next, the entire pantograph mechanism 25 is tilted with respect to the 2 nd bobbin supporting axis J2 by the 1 st tilting operation of the tilting mechanism 26. When the pantograph mechanism 25 is tilted, the contact portion 71 of the movable member 63 contacts the stopper member 75, and the movable member 63 receives the reaction force thereof and pivots about the shaft portion 66a of the hinge 66. When the movable member 63 rotates, the hook 68 separates from the projection 65, and the tip of the adjustment screw 69 abuts against the projection 65. As a result, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 2 nd angle. The bobbin holding section 23 has a holding axis J3 coaxial with the 1 st bobbin supporting axis J1 of the bobbin supporting section 22.

(step 10)

Next, after the bobbin supporting part 22 is moved upward by the lifting device 38, the bobbin holding part 23 holds the bobbin 30 with a full tube.

(step 11)

Next, after the bobbin supporting part 22 is moved downward by the lifting device 38, the tilt mechanism 25 is tilted away from the 2 nd bobbin supporting axis J2 by the 2 nd tilting operation of the tilting mechanism 26. Thus, the lifting axis J4 of the scaling mechanism 25 is arranged parallel to the 2 nd bobbin support axis J2. Further, the contact portion 71 of the movable member 63 is separated from the stopper member 75. Therefore, the movable member 63 receives the rotational force due to the weight of the bobbin grasping portion 23 and the bobbin drop lever 24, and rotates about the shaft portion 66a of the hinge 66. As a result, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 1 st angle. The bobbin holding section 23 has a holding axis J3 coaxial with the 2 nd bobbin support axis J2 of the bobbin transfer section 21.

(step 12)

Next, after the bobbin dropping lever 24 is lowered by the retracting mechanism 25, the bobbin 30 formed by the bobbin grasping portion 23 is released from being grasped. Thus, the bobbin 30 full of bobbins is attached to the hook tray 31 of the bobbin transfer unit 21.

(step 13)

Next, after the doffer rod 24 is moved up by the pantograph mechanism 25, the bobbin transfer section 21 moves the position of the hook tray 31 by a half pitch Pb in one direction of the longitudinal direction X of the spinning machine. Thus, the intermediate hook 33 is disposed immediately below the bobbin holding section 23. At this stage, the empty bobbin 30 is mounted in the intermediate hook 33.

(step 14)

Next, after the doffing lever 24 is lowered by the retracting mechanism 25, the empty bobbin 30 attached to the intermediate hook 33 is gripped by the bobbin gripping section 23.

(step 15)

Next, after the doffing lever 24 is lifted by the pantograph mechanism 25, the pantograph mechanism 25 is tilted as a whole with respect to the 2 nd bobbin support axis J2 by the 1 st tilting operation of the tilting mechanism 26. Thereby, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 2 nd angle. The bobbin holding section 23 has a holding axis J3 coaxial with the 1 st bobbin supporting axis J1 of the bobbin supporting section 22.

(step 16)

Next, after the bobbin supporting portion 22 is moved upward by the lifting device 38, the bobbin 30 held by the bobbin holding portion 23 is released. Thus, the empty bobbin 30 is attached to the support pin 37 of the bobbin support portion 22.

(step 17)

Next, after the bobbin supporting part 22 is moved downward by the lifting device 38, the tilt mechanism 25 is tilted away from the 2 nd bobbin supporting axis J2 by the 2 nd tilting operation of the tilting mechanism 26. Thereby, the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 1 st angle. The bobbin holding section 23 has a holding axis J3 coaxial with the 2 nd bobbin support axis J2 of the bobbin transfer section 21.

By the operation of the bobbin changer 20 described above, the bobbin 30 supported by the bobbin supporting portion 22 is changed from the full yarn bobbin to the empty yarn bobbin.

The bobbin replacing device 20 is operated by controlling the driving of the bobbin transfer unit 21, the bobbin support unit 22, the bobbin gripping unit 23, the scaling mechanism 25, and the tilting mechanism 26 by a control unit (not shown) which integrally controls the operations of the centrifugal spinning machine 10 and the bobbin replacing device 20.

In the above step, the empty bobbin 30 transferred by the bobbin transfer unit 21 may be transferred while being attached to the intermediate hook 33. In this case, the 2 nd to 7 th steps are omitted. In addition, the hook 31a of the hook tray 31 and the intermediate hook 33 may be replaced for use.

< effects of the embodiment >

In the embodiment of the present invention, the 2 nd bobbin supporting axis J2 of the bobbin transfer section 21 and the 1 st bobbin supporting axis J1 of the bobbin supporting section 22 are set to be horizontally displaced from each other. In a state where the lifting axis J4 of the scaling mechanism 25 is arranged parallel to the 2 nd bobbin support axis J2, the angle formed by the gripping axis J3 and the lifting axis J4 is held at the 1 st angle by the support mechanism 27, and the gripping axis J3 and the 2 nd bobbin support axis J2 are arranged coaxially. On the other hand, in a state where the raising and lowering axis J4 of the pantograph mechanism 25 is disposed obliquely with respect to the 2 nd bobbin support axis J2 by the tilting mechanism 26, the angle formed by the grip axis J3 and the raising and lowering axis J4 is maintained at the 2 nd angle larger than the 1 st angle, and the grip axis J3 and the 1 st bobbin support axis J1 are disposed coaxially. Accordingly, when the bobbin replacing device 20 performs the bobbin replacing operation, even if the position of the 1 st bobbin supporting axis J1 and the position of the 2 nd bobbin supporting axis J2 are horizontally displaced, the bobbin 30 supported by the bobbin transfer unit 21 and the bobbin 30 supported by the bobbin supporting unit 22 can be gripped by the bobbin gripping unit 23. Further, the height of the frame 11 of the centrifugal fine spinning machine 10 can be suppressed to be lower than in the case where the 1 st bobbin support axis J1 and the 2 nd bobbin support axis J2 are coaxially arranged while being displaced in the vertical direction. As a result, the height of the frame 11 of the centrifugal spinning machine 10, and hence the height of the bed of the centrifugal spinning machine 10, can be kept small without tilting the bobbin support axes J1, J2 with respect to the vertical axis J5.

In the embodiment of the present invention, the supporting mechanism 27 has the fixed member 62 fixed to the pantograph mechanism 25 and the movable member 63 attached to the fixed member 62, and the bobbin grasping portion 23 is attached to the movable member 63 via the doffer rod 24. This allows the posture of the bobbin gripping section 23 to be changed by the movement of the movable member 63 relative to the fixed member 62. In addition, the posture of the bobbin holding section 23 can be changed with a simple configuration.

In the embodiment of the present invention, the contact portion 71 is provided on the movable member 63, and the stopper member 75 is provided on the frame 11 in response to this. When the tilt mechanism 26 tilts the pantograph mechanism 25, the contact portion 71 contacts the stopper member 75 to maintain the angle formed by the grip axis J3 and the elevation axis J4 at the 2 nd angle. Accordingly, the posture of the bobbin gripping section 23 can be changed by the operation of the tilting mechanism 26 without adding a separate driving source, and the angle formed by the gripping axis J3 and the lifting axis J4 can be maintained at the 2 nd angle.

In the embodiment of the present invention, the angle formed by the gripping axis J3 and the ascent and descent axis J4 is maintained at the 1 st angle by the weight of the bobbin gripping section 23 and the doffing lever 24. This allows the support mechanism 27 to be configured with a smaller number of components.

In the embodiment of the present invention, the bobbin holding section 23 is provided with the hook portion 68 capable of adjusting the amount of change in the posture by the posture changing mechanism 61. Thus, when the pantograph mechanism 25 is tilted by the tilt mechanism 26, the angle formed by the grip axis J3 and the elevation axis J4 can be accurately matched to a desired angle.

< modification example et al >

The technical scope of the present invention is not limited to the above-described embodiments, and includes various modifications and improvements within a scope of deriving specific effects obtained by the components and combinations thereof of the present invention.

For example, in the above embodiment, the angle formed by the gripping axis J3 and the ascent and descent axis J4 is held at the 1 st angle by only the weight of the bobbin gripping section 23 and the doffing lever 24, but the present invention is not limited to this. For example, as shown in fig. 13, a spring member 77 as an elastic member may be attached to a portion of the fixed member 62 facing the movable member 63, and the 1 st angle may be held by an elastic force (spring force) of the spring member 77. However, the elastic member is not limited to the spring member, and may be, for example, a rubber-like member having elasticity. Alternatively, for example, as shown in fig. 14, a magnet 78a may be provided on the protrusion 65 of the fixed member 62, a magnet 78b may be provided on the hook 68 of the movable member 63 in accordance with the protrusion, and the 1 st angle may be maintained by magnetic force acting between these 2 magnets 78a and 78 b. However, any of the 2 magnets 78a, 78b may be a metal piece attracted by a magnet.

In this way, if the angle formed by the gripping axis J3 and the lifting axis J4 is maintained at the 1 st angle by the elastic force or the magnetic force, the vibration of the doffing lever 24 and the bobbin gripping section 23 can be suppressed during the lifting operation by the pantograph mechanism 25 and the tilting operation by the tilting mechanism 26.

In the above embodiment, the posture changing mechanism 61 is configured by using the hinge 66, but the posture changing mechanism is not limited to this, and the posture of the bobbin grasping section 23 may be changed so that the angle formed by the grasping axis J3 and the lifting axis J4 can be changed. For example, the posture changing mechanism may be constituted by a link mechanism 80 shown in fig. 15. The link mechanism 80 has an upper link 81 and a lower link 82. The upper link 81 has one end connected to the fixed member 62 by a pin 83 and the other end connected to the movable member 63 by a pin 84. Further, one end of the lower link 82 is connected to the fixed member 62 by a pin 85, and the other end is connected to the movable member 63 by a pin 86. In the link mechanism 80, as shown in fig. 15, the grip axis J3 of the bobbin grip 23 is arranged vertically in a state where the vertical movement axis J4 of the pantograph mechanism 25 is arranged vertically. As shown in fig. 16, in a state where the vertical movement axis J4 of the pantograph mechanism 25 is obliquely arranged, the posture of the bobbin gripping unit 23 changes in accordance with the operation of the link mechanism 80, and the gripping axis J3 of the bobbin gripping unit 23 is arranged vertically.

In the above embodiment, the pantograph mechanism 25 is used as an example of the elevating mechanism, but the present invention is not limited to this, and other mechanisms may be used as long as the doffer rod 24 can be elevated.

In the above-described embodiment, the centrifugal type spinning frame is described as an example of the spinning frame to which the present invention can be applied, but the present invention is not limited to this and can be applied to a ring spinning frame, for example. When applied to a ring spinning frame, spindles (not shown) are provided on the bobbin supporting portion instead of the bobbin guide rails 36. Further, in the centrifugal spinning machine, compared to the ring spinning machine, it is necessary to secure a space for movement for inserting and removing the bobbin into and from the tank in addition to a space for arranging the cylindrical member such as the tank, and therefore the height of the machine bed is likely to increase. Therefore, the effect of suppressing the height of the machine base to a low level becomes more remarkable when the present invention is applied to a centrifugal spinning machine.

Claims (8)

1. A bobbin replacing device for a spinning frame is characterized by comprising:

a bobbin supporting part which supports the bobbin with the 1 st bobbin supporting axis parallel to the vertical axis as the center;

a bobbin transfer unit for supporting a bobbin around a 2 nd bobbin supporting axis set to be horizontally displaced from the 1 st bobbin supporting axis;

a bobbin holding section for holding a bobbin around a holding axis;

a bobbin drop lever supporting the bobbin holding part;

a lifting mechanism for lifting the doffing rod in a direction parallel to a lifting axis; and

a tilting mechanism for tilting the entire lifting mechanism with respect to the vertical axis,

a supporting mechanism for supporting the bobbin holding part via the bobbin dropping rod is arranged between the lifting mechanism and the bobbin dropping rod,

the support mechanism includes an attitude changing mechanism capable of changing an attitude of the bobbin gripping section such that at least 2 different angles can be obtained between the gripping axis and the lifting axis, and maintains an angle formed between the gripping axis and the lifting axis at a 1 st angle in a state where the lifting axis is arranged parallel to the 2 nd bobbin support axis, and maintains an angle formed between the gripping axis and the lifting axis at a 2 nd angle larger than the 1 st angle in a state where the lifting axis of the lifting mechanism is inclined with respect to the 2 nd bobbin support axis by the inclining mechanism,

the gripping axis and the 2 nd bobbin supporting axis are arranged coaxially with each other in a state where the supporting mechanism holds the angle formed by the gripping axis and the lifting axis at the 1 st angle, and the gripping axis and the 1 st bobbin supporting axis are arranged coaxially with each other in a state where the supporting mechanism holds the angle formed by the gripping axis and the lifting axis at the 2 nd angle.

2. The bobbin replacing device of spinning frame as claimed in claim 1,

the support mechanism includes a fixed member fixed to the lifting mechanism and a movable member attached to the fixed member, and the bobbin holding section is attached to the movable member via the bobbin dropping rod.

3. The bobbin replacing device of spinning frame as claimed in claim 2,

the movable member is provided with a contact portion and a stopper member fixed to a frame of the spinning machine in correspondence with the contact portion,

the support mechanism holds the angle formed by the gripping axis and the lifting axis at the 2 nd angle by the abutment portion abutting against the stopper member in a state where the lifting axis of the lifting mechanism is inclined with respect to the 2 nd bobbin support axis by the inclination mechanism.

4. The bobbin replacing device of the spinning frame according to any one of claims 1 to 3,

the support mechanism holds the angle formed by the gripping axis and the lifting axis at the 1 st angle by the self weight of the bobbin gripping part and the bobbin dropping rod.

5. The bobbin replacing device of the spinning frame according to any one of claims 1 to 3,

the support mechanism holds the angle formed by the gripping axis and the lifting axis at the 1 st angle by an elastic force.

6. The bobbin replacing device of the spinning frame according to any one of claims 1 to 3,

the support mechanism holds the angle formed by the gripping axis and the lifting axis at the 1 st angle by a magnetic force.

7. The bobbin replacing device of the spinning frame according to any one of claims 1 to 6,

the support mechanism has an adjustment member capable of adjusting an amount of change in the posture of the bobbin gripping section by the posture change mechanism.

8. The bobbin replacing device of the spinning frame according to any one of claims 1 to 7,

the spinning frame is a centrifugal spinning frame.

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