CN112647169A - Bobbin replacing device of spinning frame - Google Patents
Bobbin replacing device of spinning frame Download PDFInfo
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- CN112647169A CN112647169A CN202011057019.1A CN202011057019A CN112647169A CN 112647169 A CN112647169 A CN 112647169A CN 202011057019 A CN202011057019 A CN 202011057019A CN 112647169 A CN112647169 A CN 112647169A
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- 238000009987 spinning Methods 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 172
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 238000007378 ring spinning Methods 0.000 claims abstract description 14
- 230000005856 abnormality Effects 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 22
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001589086 Bellapiscis medius Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
- D01H9/04—Doffing arrangements integral with spinning or twisting machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a bobbin replacing device of a spinning machine, which can reduce the rotation amount of a retraction mechanism along with the thermal expansion of a rod. A ring spinning frame (10) is provided with: a frame machine table (11); a retraction mechanism (21) which lifts and lowers a bobbin drop bar (20) provided with a bobbin holding device; a drive shaft (22) having an axis extending in the longitudinal direction of the frame and driving the pantograph mechanism; a power cylinder (27) that reciprocates the drive shaft; and a rotating mechanism which enables the whole retraction mechanism to rotate to a position close to the spinning machine table (11) and a position far away from the spinning machine table. The rotating mechanism is provided with: a 1 st bar (29) and a 2 nd bar (30) which reciprocate in the longitudinal direction of the frame; a 1 st cylinder (31) for reciprocating the 1 st rod; a 2 nd cylinder (32) for reciprocating the 2 nd rod; a control device (33); and a conversion mechanism for converting the linear motion of the 1 st rod and the 2 nd rod into the rotation of the whole scaling mechanism.
Description
Technical Field
The invention relates to a bobbin replacing device of a spinning frame.
Background
In recent years, automation of textile factories has progressed, and in spinning machines such as ring frames and ring twisters, doffing associated with a full bobbin and bobbin replacement work for inserting a new empty bobbin into a spindle are automatically performed by a bobbin replacing device. In the bobbin replacing device, a conveying device with plugs protruding at the same pitch as the spindle pitch is arranged below the spindle row of the spinning machine table, and a receiving table with middle plugs protruding at the same pitch as the spindle pitch is arranged between the conveying device and the spindle row. The doffing bar including the bobbin holding devices arranged at the same pitch as the spindle pitch is lifted and lowered between the spindle line and the transport device by the retraction mechanism, and the retraction mechanism as a whole is configured to be rotatable to a position close to the machine base and a position away from the machine base.
In the bobbin replacing operation, the doffing lever moves to a position for gripping an empty bobbin on the transport device, a position for inserting an intermediate plug into the empty bobbin on the receiving table, a position for gripping a full bobbin on the spindle, and the like. The doffing rod moves to each position by lifting the doffing rod based on the action of the retraction mechanism and rotating the retraction mechanism in a mode of integrally approaching or departing from the machine table by utilizing the action of the rotating device.
A turning device that turns the entire pantograph mechanism so as to approach or separate from a machine base is disclosed in patent document 1, for example.
As shown in fig. 10, the turning device includes: a rod 81 movably disposed along the longitudinal direction of the machine base, an air cylinder 82 for reciprocating the rod 81, and a conversion device 83 for converting the reciprocating movement of the rod 81 into the rotation of a not-shown pantograph mechanism. The conversion device 83 includes: a rod 84 having a base end portion connected to a drive shaft, not shown, that supports the base end of the pantograph mechanism so as to be integrally rotatable; a link 85 having a 1 st end 85a connected to a distal end of the rod 84; and a drive lever 86 to which the 2 nd end 85b of the link 85 is rotatably coupled. The drive lever 86 is bent in a V-shape, and the bent portion 86a is rotatably supported by the frame. The 1 st end portion 86b of the drive lever 86 is immovably coupled to the rod 81, and the 2 nd end portion 85b of the link 85 is rotatably coupled to the 2 nd end portion 86c of the drive lever 86.
When the rod 81 is at the initial position where it is retracted into the cylinder 82, the rod 84 connected via the drive rod 86 and the link 85 is in a lowered state, and the pantograph mechanism connected to the rod 84 is at a position close to the machine base. When the rod 81 is moved to the protruding position by the driving of the air cylinder 82, the driving lever 86 rotates, and the 2 nd end portion 86c of the driving lever 86 rises. Thus, the rod 84 ascends together with the link 85, and the pantograph mechanism connected to the rod 84 is moved away from the machine base.
Patent document 1: japanese laid-open patent publication No. 7-126930
Then, at the installation position of the spinning machine, for example, when the ambient temperature rises along with the operation of the spinning machine, the rod 81 thermally expands. As shown by the two-dot chain line in fig. 10, when the rod 81 thermally expands in the axial direction, the 1 st end portion 86b connected to the rod 81 changes in position due to the thermal expansion, and the drive lever 86 rotates due to the change in the position of the 1 st end portion 86 b. Thus, the link 85 is raised along with the rotation of the drive lever 86, and the lever 84 is rotated to rotate the entire pantograph mechanism. If the thermal expansion of the rod 81 exceeds a predetermined allowable range, the doffing lever is disposed at a position displaced from the respective positions in accordance with the rotation of the retraction mechanism, and a trouble such as an obstruction of the insertion of an empty bobbin into a spindle occurs.
Disclosure of Invention
The invention aims to provide a bobbin replacing device of a spinning machine, which can reduce the rotation amount of a retraction mechanism caused by the thermal expansion of a rod.
The bobbin replacing device for a spinning machine for solving the above problems includes: a frame machine table; a retraction mechanism for lifting a bobbin dropping rod provided with a bobbin holding device; a drive shaft whose axis extends in the longitudinal direction of the machine frame and drives the pantograph mechanism; a drive mechanism that reciprocates the drive shaft in an axial direction of the drive shaft; and a rotating mechanism for rotating the entire pantograph mechanism to a position close to the frame and a position far from the frame, the rotating mechanism including: a rod having an axis extending in a longitudinal direction of the frame table and reciprocating in the longitudinal direction; a rod driving mechanism for reciprocating the rod; a control device for controlling the rod driving mechanism; and a conversion mechanism which is connected to the rods and converts the linear motion of the rods into the rotational motion of the entire retraction mechanism, wherein the bobbin replacing device for a spinning machine includes a plurality of rods arranged in parallel in the longitudinal direction of the machine base and the rod driving mechanism.
Accordingly, the temperature of the rod may increase with an increase in the ambient temperature at the installation position of the spinning frame, and the rod may thermally expand in the axial direction. The thermal expansion amount of each bar at the same ambient temperature can be suppressed as compared with a spinning machine including only one bar. Therefore, even if the conversion mechanism is moved in the axial direction of the rods due to thermal expansion of the rods, the amount of movement can be reduced compared to a spinning machine including only one rod, and the amount of rotation of the pantograph mechanism due to thermal expansion of the rods can be reduced.
In the bobbin replacing device for a spinning machine, the rod driving mechanisms may each include a detection device for detecting whether or not there is an abnormality in the rod driving mechanism, and the control device may disable or stop driving of the rod driving mechanism for which there is no abnormality detected by the detection device when the detection device detects an abnormality in the rod driving mechanism.
Accordingly, the plurality of rods are synchronously reciprocated, and the collapsing mechanism is rotated without twisting the doffing rod in synchronization with the conversion mechanism connected to each rod. However, if the normal stick driving mechanism and the abnormal stick driving mechanism coexist, the plurality of sticks do not reciprocate in synchronization, and the plurality of conversion mechanisms are not synchronized, and as a result, the telescoping mechanisms are not synchronized, and the doffer lever is twisted. Therefore, when the abnormality of the rod driving mechanisms is detected by the detection device, in other words, when the asynchronization between the rods occurs, the normal rod driving mechanisms are not driven or stopped, thereby suppressing the misalignment of the plurality of rod driving mechanisms. As a result, the shift of the moving amount between the plurality of rods, in other words, the out-of-sync between the rods and the out-of-sync of the conversion mechanism are suppressed, and the shift of the pantograph mechanism is suppressed to suppress the torsion of the drop tube rod.
In the bobbin exchanging device for a spinning frame, the rod driving mechanism may move the rod in a forward direction from an initial position to an operating position, and the retraction mechanism may be rotated to a position away from the frame of the spinning frame, the rod driving mechanism makes the rod return to the initial position from the operating position, so that the retraction mechanism rotates from a position far away from the machine platform to a position close to the machine platform, after the control device performs control for driving all the rod driving mechanisms, the detection device detects an abnormality that any one of the rods is in the initial position, and when the abnormality is detected for a predetermined time, the control device drives the rod driving mechanism, which has not detected the abnormality by the detection device, to return to the initial position.
Accordingly, when the rod driving mechanism is driven and the abnormality of the rod driving mechanism is detected by the detection device, the normal rod driving mechanism is driven to make all the rods positioned at the initial position. Therefore, the deviation of the moving amount between the plurality of rods is eliminated, and the non-synchronization of the conversion mechanism is also eliminated, so that the torsion of the drop tube rod can be eliminated by suppressing the deviation of the pantograph mechanism.
In the bobbin exchanging device for a spinning machine, the doffing bars may be provided for each of the plurality of bars, and the plurality of doffing bars may be arranged in a line in a longitudinal direction of the spinning machine base.
Accordingly, when the plurality of rods reciprocate asynchronously, the plurality of conversion mechanisms are asynchronous with each other, and the rotation amount of the scaling mechanism varies. However, since the doffer bars are provided for each bar, even if there is a variation in the amount of rotation of the pantograph mechanism, each doffer bar moves in accordance with the amount of rotation, and therefore, twisting is less likely to occur as in the case of one doffer bar.
According to the present invention, the amount of rotation of the pantograph mechanism due to thermal expansion of the rod can be reduced.
Drawings
Fig. 1 (a) is a schematic front view showing a frame and a bobbin changer, and (b) is a schematic front view showing the bobbin changer.
Fig. 2 is a schematic side view showing a frame and a bobbin changer.
Fig. 3 (a) is a view schematically showing a state where the rod is at the initial position, and (b) is a view schematically showing a state where the rod is at the operating position.
Fig. 4 (a) and (b) are schematic side views showing the operation of the bobbin replacing device.
Fig. 5 is a schematic side view showing a state in which the entire pantograph mechanism is pivoted.
Fig. 6 is a schematic side view showing a state where an empty bobbin is moved from an intermediate plug to a spindle.
Fig. 7 (a) is a view schematically showing a state where the 1 st and 2 nd rods are in the initial positions, and (b) is a view schematically showing a state where they are in the operating positions.
Fig. 8 (a) is a view schematically showing a state where an abnormality has occurred in the 1 st cylinder, and (b) is a view schematically showing a state where the 2 nd rod is returned to the initial position.
Fig. 9 is a schematic front view showing another example of the ring spinning frame.
Fig. 10 is a diagram showing a background art.
Description of the reference numerals
11 … spinning machine table; 18 … bobbin changing device; 19 … bobbin holding device; 20 … doffing rod; 21 … scaling mechanism; 22 … drive shaft; 27 … as a power cylinder of the driving mechanism; 29 st bar 29 …; 30 … bar 2; 31 … cylinder 1 as rod driving mechanism; 32 … as the 2 nd cylinder of the stick driving mechanism; 33 … control device; 40 … a switching mechanism; 51 … as the 1 st sensor of the detection device; 52 … as the 2 nd sensor of the detection device; 201 … 1 st doffing rod; 202 … shaft 2.
Detailed Description
Hereinafter, an embodiment embodying the bobbin replacing device of the spinning machine will be described with reference to fig. 1 to 8.
As shown in fig. 1 (a), a frame bed 11 of a ring spinning frame 10 as a spinning frame includes a spindle guide 12 mounted on an outer end OE and a gear end GE. The ring spinning frame 10 includes a plurality of spindles 13 arranged on a spindle guide 12. The plurality of spindles 13 are arranged at a predetermined pitch in the longitudinal direction of the spindle guide 12.
As shown in fig. 2, the ring spinning frame 10 includes a transfer device 15 for transferring bobbins by using a plug tray 14 below a spindle guide 12. The ring spinning frame 10 includes a support bar 16 disposed on the front side of the spindle guide 12. The support rod 16 extends along the spindle guide rail 12, and intermediate plugs 17 are protruded on the upper surface of the support rod 16 at the same pitch as the spindle pitch.
The ring spinning frame 10 includes: a bobbin replacing device 18 of a spindle-aligned type provided in the frame 11. The bobbin replacing device 18 will be explained.
As shown in fig. 1 (a), the bobbin exchanging device 18 includes a plurality of retraction mechanisms 21 for raising and lowering a bobbin drop bar 20 including a bobbin gripping device 19. Each pantograph mechanism 21 is driven by a drive shaft 22 whose axis extends in the longitudinal direction of the frame 11. The drive shaft 22 reciprocates in the axial direction of the drive shaft 22 by the operation of a power cylinder 27 as a drive mechanism disposed at the outer end OE. The power cylinder 27 is configured to reciprocate the movable tube in the longitudinal direction thereof by reciprocating rotation of a screw shaft of a ball screw mechanism, not shown. A drive shaft 22 is connected to the end of the movable barrel.
Each pantograph mechanism 21 includes a link mechanism including a 1 st link 131 and a 2 nd link 132. The length of the 1 st link 131 in the axial direction is greater than the length of the 2 nd link 132 in the axial direction. In the present embodiment, the length of the 2 nd link 132 in the axial direction is 1/2 of the length of the 1 st link 131 in the axial direction. The 1 st end 131a of the 1 st link 131 is coupled to the drop cylinder lever 20, and the 2 nd end 131b of the 1 st link 131 is coupled to the moving bracket 25. The moving bracket 25 is rotatable about the drive shaft 22 and is supported so as to be integrally movable in the axial direction of the drive shaft 22.
The 1 st end 132a of the 2 nd link 132 is pin-coupled to the center of the 1 st link 131, and the 2 nd end 132b of the 2 nd link 132 is pin-coupled to the support bracket 26. Each support bracket 26 is restricted in movement in the axial direction of the drive shaft 22 by the fixed ring 23. Each support bracket 26 is disposed in a state allowing sliding of the drive shaft 22. In the pantograph mechanism 21, when the drive shaft 22 moves forward, the doffer rod 20 is raised by the link mechanism, and when the drive shaft 22 moves backward, the doffer rod 20 is lowered by the link mechanism.
The ring spinning frame 10 includes a turning mechanism that turns the entire retraction mechanism 21 to a position close to the frame 11 and a position far from the frame 11. The scaling mechanism 21 is configured to be rotatable in a direction orthogonal to the longitudinal direction of the frame 11 about the drive shaft 22 as a whole. The longitudinal direction of the frame 11 coincides with the axial direction of the drive shaft 22, and the direction orthogonal to the longitudinal direction of the frame 11 coincides with the front-rear direction of the frame 11.
As shown in fig. 2, the 1 st end 28a of the rod 28 in the axial direction is connected to each support bracket 26. The 2 nd end portion 28b in the axial direction of each rod 28 is coupled to the conversion mechanism 40.
Next, a turning mechanism for turning the entire pantograph mechanism 21 to a position close to the machine base 11 and a position away from the machine base 11 will be described.
As shown in fig. 1 (a) or 1 (b), the turning mechanism includes: a 1 st rod 29 and a 2 nd rod 30 arranged in parallel with the drive shaft 22; a 1 st cylinder 31 as a rod driving mechanism for reciprocating the 1 st rod 29; and a 2 nd cylinder 32 as a rod driving mechanism reciprocating the 2 nd rod 30. Therefore, the rotating mechanism includes a plurality of rods and a rod driving mechanism.
Further, the rotating mechanism includes: a control device 33 that controls driving of the 1 st cylinder 31 and the 2 nd cylinder 32; and the above-described conversion mechanism 40 shown in fig. 2 or 3 (a) that converts the linear motion of the 1 st rod 29 and the 2 nd rod 30 into the rotational motion of the pantograph mechanism 21. The control device 33 is mainly constituted by a microcomputer, for example. The processing executed by the control device 33 may be performed by the CPU executing processing stored in a memory not shown, or may be performed by hardware processing using a dedicated electronic circuit. The control device 33 controls the rotation of the pantograph mechanism 21 by controlling the driving of the cylinder 27, the driving of the 1 st cylinder 31, and the driving of the 2 nd cylinder 32 of the bobbin replacing device 18. The control device 33 controls the driving of the transfer device 15.
In the frame 11, the 1 st bar 29 and the 2 nd bar 30 are disposed below the frame 11. The 1 st bar 29 and the 2 nd bar 30 are disposed in a state where the axis L extends in the longitudinal direction of the frame 11. The 1 st bar 29 is disposed to extend between an outer end OE in the longitudinal direction of the frame 11 and the center of the frame 11. The 2 nd bar 30 is disposed in a state of extending between the gear end GE in the longitudinal direction of the frame 11 and the center of the frame 11.
The axes L of the 1 st bar 29 and the 2 nd bar 30 are aligned in a straight line in the longitudinal direction of the frame 11. The 1 st bar 29 and the 2 nd bar 30 are juxtaposed so as not to overlap each other in the front-rear direction when the frame base 11 is viewed from the front surface side. The 1 st bar 29 and the 2 nd bar 30 are provided in parallel so that the two bars, the 1 st bar 29 and the 2 nd bar 30, extend over the entire longitudinal direction of the spinning machine base 11. Of the two ends in the axial direction of the 1 st rod 29, the end closer to the center in the longitudinal direction of the frame 11 and the two ends in the axial direction of the 2 nd rod 30, the end closer to the center in the longitudinal direction of the frame 11 face each other at a distance in the longitudinal direction of the frame 11.
The 1 st cylinder 31 and the 2 nd cylinder 32 are connected to a compressed air source, not shown. Further, the supply of air from the compressed air source is controlled by the control device 33, thereby controlling the driving of the 1 st cylinder 31 and the 2 nd cylinder 32. As a result, the 1 st bar 29 is reciprocated in the longitudinal direction of the frame 11 by the 1 st cylinder 31, and the 2 nd bar 30 is reciprocated in the longitudinal direction of the frame 11 by the 2 nd cylinder 32.
As shown in fig. 2 or fig. 3 (a), each conversion mechanism 40 includes: a drive lever 41 coupled to the 1 st rod 29 or the 2 nd rod 30, a bracket 42 supporting the drive lever 41, and a link 44 coupling the drive lever 41 and the lever 28. In each conversion mechanism 40, the bracket 42 is disposed below the frame 11 and above the 1 st bar 29 or the 2 nd bar 30. The brackets 42 are disposed at positions facing the support brackets 26.
Each bracket 42 includes: a fixing piece 43 fixed on the lower part of the frame 11; and a support piece 45 projecting from the lower portion of the fixing piece 43 in the front-rear direction at a distance. The drive lever 41 is rotatably supported between a pair of support pieces 45 of the bracket 42. The drive lever 41 has almost a V shape as viewed in the front-rear direction. The drive lever 41 is rotatably supported by a pair of support pieces 45 of the bracket 42 in the bent portion 41 a.
The V-shaped 1 st end portion 41b of the drive lever 41 is coupled to a bearing 46 fixed to the 1 st rod 29 or the 2 nd rod 30 so as to be rotatable with respect to the bearing 46. The V-shaped 2 nd end portion 41c of the drive lever 41 is coupled to the 2 nd end portion 28b of the lever 28 via a link 44. The 1 st end 44a of the link 44 in the axial direction is rotatably coupled to the 2 nd end 41c of the drive lever 41, and the 2 nd end 44b of the link 44 is rotatably coupled to the 2 nd end 28b of the lever 28.
When the drive lever 41 is rotated by the reciprocating movement of the 1 st rod 29 or the 2 nd rod 30, the link 44 moves up and down, and the tip of the lever 28 moves up and down via the link 44 along with the up and down movement of the link 44. That is, the support bracket 26 and the rod 28 are rotated integrally about the drive shaft 22 by driving the 1 st cylinder 31 or the 2 nd cylinder 32, and as shown in fig. 5, the entire pantograph mechanism 21 is rotated about the drive shaft 22 together with the support bracket 26.
As shown in fig. 7 (a), in the 1 st cylinder 31 and the 2 nd cylinder 32, the piston P is moved to the end of the stroke in the cylinder T, and the position where the 1 st rod 29 and the 2 nd rod 30 are retracted is set as the initial position. In the state where the 1 st bar 29 and the 2 nd bar 30 are at the initial positions, the rod 28 is almost in the horizontal state, and the pantograph mechanism 21 is kept in the vertical state. In the state where the 1 st bar 29 and the 2 nd bar 30 are at the initial positions, the entire pantograph mechanism 21 is positioned closest to the machine base 11, and the doffing lever 20 and the bobbin holding device 19 are also positioned closest to the machine base 11. Further, in a state where the drive shaft 22 is most retracted toward the power cylinder 27 side and the 1 st rod 29 and the 2 nd rod 30 are in the initial positions, the doffing lever 20 is in the standby position where the doffing lever 20 is located above the plug tray 14.
As shown in fig. 7 (b), the position where the 1 st rod 29 protrudes most from the 1 st cylinder 31 and the 2 nd rod 30 protrudes most from the 2 nd cylinder 32 is set as the operation position of the 1 st rod 29 and the 2 nd rod 30. In the state where the 1 st bar 29 and the 2 nd bar 30 are in the operating positions, the respective rods 28 connected to the 1 st bar 29 and the respective rods 28 connected to the 2 nd bar 30 are inclined so that the tips thereof face upward, the entire pantograph mechanism 21 is pivoted to a position farthest from the frame 11, and the doffer bar 20 is also positioned farthest from the frame 11.
The 1 st cylinder 31 and the 2 nd cylinder 32 are synchronously driven by the control device 33. Therefore, when the 1 st and 2 nd cylinders 31 and 32 are controlled so that the 1 st and 2 nd rods 29 and 30 move from the initial positions to the operating positions, the 1 st and 2 nd rods 29 and 30 move forward in synchronization with each other by the 1 st and 2 nd cylinders 31 and 32, and protrude from the cylinder T.
The conversion mechanism 40 coupled to the 1 st rod 29 and the conversion mechanism 40 coupled to the 2 nd rod 30 also operate in synchronization. Therefore, the scaling mechanism 21 rotates integrally in synchronization. As a result, the entire pantograph mechanism 21 is pivoted to a position away from the frame 11. In other words, the pantograph mechanism 21 is rotated toward a position away from the frame 11 by the forward movement of the 1 st bar 29 and the 2 nd bar 30 from the initial position toward the operating position.
On the other hand, when the 1 st and 2 nd cylinders 31 and 32 are controlled so that the 1 st and 2 nd rods 29 and 30 move from the operating positions to the initial positions, the 1 st and 2 nd rods 29 and 30 synchronously return and move back by the 1 st and 2 nd cylinders 31 and 32, and sink into the cylinder T.
Further, the conversion mechanism 40 coupled to the 1 st rod 29 and the conversion mechanism 40 coupled to the 2 nd rod 30 also operate in synchronization. Therefore, the scaling mechanism 21 rotates integrally in synchronization. As a result, the entire pantograph mechanism 21 is pivoted from a position distant from the machine base 11 to a position close to the machine base 11. In other words, the 1 st bar 29 and the 2 nd bar 30 move backward from the operation position toward the initial position, so that the pantograph mechanism 21 rotates from a position away from the frame base 11 to a position close to the frame base 11.
Further, in a state where the 1 st and 2 nd sticks 29 and 30 are held at the intermediate position between the initial position and the operating position, the rotational amount of the entire retraction mechanism 21 becomes an intermediate value between the maximum and minimum values, and at this position, the bobbin holding device 19 is positioned on the extension of the center axis of the center plug 17.
The bobbin replacing operation by the bobbin replacing device 18 configured as described above is performed as follows.
First, the doffing lever 20 is lowered from the standby position to the gripping position of the empty bobbin E on the plug tray 14, and the empty bobbin E is gripped by the bobbin gripping device 19 as shown in fig. 4 (a). Next, as shown by an arrow a in fig. 4 (a), the bobbin drop rod 20 is raised, and the empty bobbin E gripped by the bobbin gripping device 19 is pulled out from the plug 14 a.
Next, as indicated by arrow b, after the entire pantograph mechanism 21 is turned in a direction away from the frame 11, as indicated by arrow c, the doffer rod 20 is raised, and as shown in fig. 5, the empty bobbin E is positioned above the middle plug 17.
After the entire pantograph mechanism 21 is slightly rotated toward the frame base 11 as indicated by an arrow d in fig. 4 (a), the doffer rod 20 is lowered as indicated by an arrow E in fig. 4 (a), and the empty bobbin E is inserted into the middle plug 17 as indicated by fig. 4 (b).
Next, in fig. 4 (a), after the empty bobbin E is released from being gripped by the bobbin gripping device 19, the bobbin gripping device 19 is raised to a front position corresponding to the top of the full bobbin F as indicated by an arrow F. From this state, as indicated by an arrow g, the entire retraction mechanism 21 is rotated toward the frame 11, and the bobbin holding device 19 is moved to a position corresponding to the top of the full bobbin F. Then, as indicated by an arrow h, the doffing lever 20 is lowered to the full bobbin gripping position, and the full bobbin F is gripped by the bobbin gripping device 19.
Thereafter, as shown by an arrow i in fig. 4 (b), the doffing lever 20 is raised to pull out the full bobbin F from the spindle 13, and the doffing lever 20 is raised to a position where the full bobbin F does not interfere with the spindle 13.
Next, as indicated by an arrow j, after the entire retraction mechanism 21 is rotated in a direction away from the spinning machine base 11, as indicated by an arrow k, the doffing rod 20 is lowered, and the bobbin holding device 19 is moved forward and downward of the spindle guide 12. Then, after the entire pantograph mechanism 21 is pivoted toward the frame 11 as indicated by arrow l to dispose the bottom of the full bobbin F above the plug 14a, the full bobbin F is inserted into the plug 14a of the transfer device 15 as shown in fig. 6 when the doffer rod 20 is further lowered as indicated by arrow m.
Next, although not shown in fig. 6, the doffing lever 20 is raised, the entire retraction mechanism 21 is rotated in a direction away from the machine base 11, the doffing lever 20 is raised, and the entire retraction mechanism 21 is rotated toward the machine base 11, so that the bobbin holding device 19 is positioned above the empty bobbin E into which the middle plug 17 is inserted. Next, the doffing lever 20 is lowered to the position of the empty bobbin E, and the bobbin holding device 19 holds the empty bobbin E. Next, as indicated by an arrow n in fig. 6, the bobbin drop rod 20 is raised, and the empty bobbin E gripped by the bobbin gripping device 19 is pulled out from the intermediate plug 17.
Next, as indicated by an arrow o, the entire pantograph mechanism 21 is rotated in a direction away from the machine base 11, and then, as indicated by an arrow p, the doffer rod 20 is raised. Next, after the entire pantograph mechanism 21 is pivoted toward the spinning machine base 11 as indicated by an arrow q, the doffing rod 20 is lowered as indicated by an arrow r, and an empty bobbin E is inserted into the spindle 13. Thereafter, the doffing lever 20 is raised, the entire pantograph mechanism 21 is rotated, and the doffing lever 20 is lowered in a predetermined order, and the doffing lever 20 is returned to the standby position below the spindle 13.
The ring spinning frame 10 is provided with a fail-safe mechanism 50.
As shown in fig. 1 (b), the fail-safe mechanism 50 includes: a 1 st sensor 51 as a detection device for detecting the presence or absence of abnormality of the 1 st cylinder 31; a 2 nd sensor 52 as a detection device for detecting the presence or absence of abnormality in the 2 nd cylinder 32; and a control device 33. In the present embodiment, the 1 st sensor 51 detects the position of the 1 st rod 29 to detect the presence or absence of an abnormality in the 1 st cylinder 31, and the 2 nd sensor 52 detects the position of the 2 nd rod 30 to detect the presence or absence of an abnormality in the 2 nd cylinder 32.
The 1 st sensor 51 and the 2 nd sensor 52 are in signal connection with the control device 33. The 1 st sensor 51 includes: an immersion sensor 51a for detecting the end of the 1 st rod 29 when the 1 st cylinder 31 is controlled by the control device 33 so that the 1 st rod 29 is positioned at the initial position. The 1 st sensor 51 further includes: and a protrusion sensor 51b for detecting the presence or absence of the end of the 1 st rod 29 when the 1 st cylinder 31 is controlled by the control device 33 so that the 1 st rod 29 is positioned at the operating position.
The 2 nd sensor 52 includes: the sensor 52a for detecting the end of the 2 nd rod 30 is used for detecting the end of the 2 nd rod 30 when the 2 nd cylinder 32 is controlled in a mode that the 2 nd rod 30 is positioned at the initial position. Further, the 2 nd sensor 52 includes: and a protrusion sensor 52b for detecting the presence or absence of the end of the 2 nd rod 30 when the 2 nd cylinder 32 is controlled by the control device 33 so that the 2 nd rod 30 is positioned at the operating position. Fig. 1 (b) shows a state where the 1 st rod 29 and the 2 nd rod 30 are in the operating positions.
In the 1 st sensor 51, the entry sensor 51a outputs an on signal to the control unit 33 when detecting the end of the 1 st rod 29, and the protrusion sensor 51b outputs an on signal to the control unit 33 when detecting the end of the 1 st rod 29. Therefore, when the 1 st rod 29 is at the initial position, the entry sensor 51a outputs the on signal, and the projection sensor 51b does not detect the end of the 1 st rod 29 and does not output the on signal. When the 1 st rod 29 is at the operating position, the entry sensor 51a and the projection sensor 51b output on signals. Therefore, when the 1 st rod 29 is at the operating position, the state in which the entry sensor 51a and the projection sensor 51b output the on signal is normal, and the state in which the projection sensor 51b does not output the on signal is abnormal.
Similarly, in the 2 nd sensor 52, the entry sensor 52a outputs an on signal to the control unit 33 when detecting the end of the 2 nd rod 30, and the projection sensor 52b outputs an on signal to the control unit 33 when detecting the end of the 2 nd rod 30. Therefore, when the 2 nd rod 30 is at the initial position, the entry sensor 52a outputs the on signal, and the projection sensor 52b does not detect the end of the 2 nd rod 30 and does not output the on signal. When the 2 nd rod 30 is at the operating position, the entry sensor 52a and the projection sensor 52b output on signals. Therefore, when the 2 nd rod 30 is at the operating position, the state in which the entry sensor 52a and the protrusion sensor 52b output the on signal is normal, and the state in which the protrusion sensor 52b does not output the on signal is abnormal.
Next, the operation of the fail-safe mechanism 50 by the control device 33 will be described. As shown in fig. 7 (a), the 1 st and 2 nd rods 29, 30 are in the initial positions, the respective entry sensors 51a, 52a output on signals, and the projection sensors 51b, 52b do not detect the end of the 1 st rod 29. The control device 33 receives an on signal from the submerging sensors 51a and 52 a.
When the ring spinning frame 10 is operated and the pantograph mechanism 21 is pivoted in a direction away from the frame 11, the controller 33 drives the 1 st cylinder 31 and the 2 nd cylinder 32 to move the 1 st bar 29 and the 2 nd bar 30 from the initial positions to the operating positions.
As shown in fig. 7 (b), when the 1 st cylinder 31 and the 2 nd cylinder 32 are normally operated, the end of the 1 st rod 29 is detected by the protrusion sensor 51b of the 1 st sensor 51, and the end of the 2 nd rod 30 is detected by the protrusion sensor 52b of the 2 nd sensor 52. Therefore, the protrusion sensors 51b and 52b output an on signal indicating that the ends of the respective rods 29 and 30 are detected to the control device 33. Therefore, the control device 33 receives both the on signals from the entry sensors 51a and 52a and the on signals from the projection sensors 51b and 52 b. The control device 33 determines that the 1 st cylinder 31 and the 2 nd cylinder 32 are operating normally.
On the other hand, when the 1 st cylinder 31 is abnormal and the 2 nd cylinder 32 is normally operated, the control device 33 controls the 1 st rod 29 and the 2 nd rod 30 to move from the initial position to the operating position, but the 1 st cylinder 31 is not driven. In this case, as shown in fig. 8 (a), the tip of the 1 st rod 29 is not detected by the protrusion sensor 51b of the 1 st sensor 51. On the other hand, the protrusion sensor 52b of the 2 nd sensor 52 outputs an on signal to detect the end of the 2 nd rod 30. Therefore, the control device 33 receives the on signals from the entry sensors 51a and 52a and the on signal from the projection sensor 52b of the 2 nd sensor 52, but does not receive the on signal from the projection sensor 51b of the 1 st sensor 51.
After the control of the 1 st cylinder 31 and the 2 nd cylinder 32 for moving the 1 st rod 29 and the 2 nd rod 30 to the operating positions is performed, the control device 33 determines that an abnormality has occurred in the 1 st cylinder 31 when the 1 st rod 29 is not detected by the protrusion sensor 51b for a predetermined time.
As shown in fig. 8 (b), when it is determined that there is an abnormality in the 1 st cylinder 31, the controller 33 drives the 2 nd cylinder 32 in which the abnormality is not detected to return the 2 nd rod 30 from the operating position to the initial position. In other words, after the control unit 33 performs the control of driving the 1 st and 2 nd cylinders 31 and 32, when the 1 st sensor 51 detects an abnormality such that the 1 st rod 29 is at the initial position and the detected abnormality continues for a predetermined time, the control unit 33 drives the 2 nd cylinder 32 in which the abnormality is not detected by the 2 nd sensor 52. Before the 2 nd rod 30 reaches the operating position, the 2 nd rod 30 is returned to the initial position by driving the 2 nd cylinder 32. Thus, both the 1 st rod 29 and the 2 nd rod 30 are located at the initial positions. In other words, after the control unit 33 performs control for driving all the rod driving mechanisms, the detection unit detects an abnormality that any one of the rods is at the initial position, and when the abnormality is detected for a predetermined time, the control unit 33 drives the rod driving mechanism for which the abnormality is not detected by the detection unit to return to the initial position.
Next, the operation of the bobbin changer 18 will be described.
When the ambient temperature rises in accordance with the operation of the ring frame 10 at the installation position of the ring frame 10, the 1 st and 2 nd bars 29, 30 thermally expand. As shown in fig. 3 (b), the 1 st end 41b of the drive lever 41 coupled to the 1 st and 2 nd rods 29 and 30 is changed in position due to thermal expansion, and the drive lever 41 is rotated due to the change in the position of the 1 st end 41 b. Then, the link 44 is lifted in accordance with the rotation of the drive lever 41, and the lever 28 is rotated to rotate the pantograph mechanism 21.
Here, a case where the rod constituting the conversion mechanism 40 is not two of the 1 st rod 29 and the 2 nd rod 30 but one rod extending in the entire longitudinal direction of the frame 11 is taken as a comparative example. Since the length of the 1 st rod 29 and the 2 nd rod 30 in the axial direction is shorter than that of the one rod of the comparative example, the thermal expansion amount is smaller than that of the one rod, and the rotation amount of the drive lever 41 due to thermal expansion is smaller than that of the comparative example. Therefore, even if the drive lever 41 rotates to rotate the pantograph mechanism 21 in accordance with the thermal expansion of the 1 st rod 29 and the 2 nd rod 30, the amount of rotation can be made smaller than that in the comparative example.
According to the above embodiment, the following effects can be obtained.
(1) By arranging the 1 st bar 29 and the 2 nd bar 30 in parallel in the longitudinal direction of the frame 11, the amount of rotation of the pantograph mechanism 21 due to thermal expansion of the bars can be reduced as compared with the case of one bar extending in the entire longitudinal direction of the frame 11. Therefore, in each operation performed by rotating the pantograph mechanism 21 in a direction away from the frame 11 in the bobbin replacing operation by the bobbin replacing device 18, the amount of rotation of the pantograph mechanism 21 is suppressed from exceeding the predetermined range, and each operation can be performed smoothly. For example, in the working position for inserting the empty bobbin E into the spindle 13, the empty bobbin E can be smoothly inserted into the spindle 13 by reducing the displacement of the empty bobbin E with respect to the spindle 13.
(2) When the pantograph mechanism 21 is rotated in a direction away from the frame 11, if an abnormality occurs in any one of the 1 st cylinder 31 and the 2 nd cylinder 32 and the rod in which the abnormality occurs is held at the initial position, the controller 33 drives the normal cylinder to return the 1 st rod 29 and the 2 nd rod 30 to the initial position. Therefore, when the 1 st cylinder 31 is detected as abnormal by the 1 st sensor 51 after the 1 st cylinder 31 and the 2 nd cylinder 32 are driven, the normal 2 nd cylinder 32 is driven to position the 1 st rod 29 and the 2 nd rod 30 at the initial positions. Therefore, by eliminating the amount of shift between the 1 st rod 29 and the 2 nd rod 30, the asynchronous shift of the conversion mechanism 40 is eliminated, and the torsion of the doffing rod 20 can be eliminated while suppressing the shift of the pantograph mechanism 21. This can suppress damage to the bobbin replacing device 18.
(3) The longer the length of the frame 11 in the longitudinal direction, the greater the thermal expansion amount of the rod. Therefore, the ring spinning frame 10 having a plurality of bars is configured such that the thermal expansion amount of each bar is reduced and the rotation amount of the scaling mechanism 21 is reduced, and the longer the length in the longitudinal direction of the frame 11 is, the more effective it is.
This embodiment can be modified and implemented as follows. This embodiment and the following modifications can be combined and implemented within a range not technically contradictory to each other.
As shown in fig. 9, the doffing bar 20 may be divided in the longitudinal direction of the spinning machine base 11. For example, the 1 st doffing rod 201 is connected to the pantograph mechanism 21 connected to the conversion mechanism 40 driven by the reciprocating movement of the 1 st rod 29, and the 2 nd doffing rod 202 is connected to the pantograph mechanism 21 connected to the conversion mechanism 40 driven by the reciprocating movement of the 2 nd rod 30. The 1 st doffing rod 201 and the 2 nd doffing rod 202 are arranged in parallel in the longitudinal direction of the frame 11.
In the case of such a configuration, if an abnormality occurs in any one of the 1 st cylinder 31 and the 2 nd cylinder 32, the normal cylinder and the abnormal cylinder coexist. When the 1 st rod 29 and the 2 nd rod 30 reciprocate asynchronously, the scaling mechanisms 21 are asynchronous with each other between the conversion mechanisms 40, and the rotation amounts are deviated between the scaling mechanisms 21. In this way, in the case where the doffer bar 20 is continuous, torsion is caused to occur in the doffer bar 20. However, since the 1 st doffing lever 201 is provided corresponding to the 1 st bar 29 and the 2 nd doffing lever 202 is provided corresponding to the 2 nd bar 30, even if the amount of rotation of the pantograph mechanism 21 is deviated, the doffing levers 201 and 202 move in accordance with the amount of rotation, and therefore, the twist is not easily generated in the case of one doffing lever 20.
A detection device for detecting the operation of the 1 st cylinder 31 and the 2 nd cylinder 32 may be used as a sensor for detecting the position of the piston P. In the case of such a configuration, it is possible to detect an abnormality in the 1 st cylinder 31 and the 2 nd cylinder 32 in the middle of the movement of the 1 st rod 29 and the 2 nd rod 30 from the initial position to the operating position.
When the abnormality of either the 1 st cylinder 31 or the 2 nd cylinder 32 is detected by the detection device, the normal cylinder is stopped, thereby suppressing the displacement of the plurality of rods.
Alternatively, the detection means for detecting the operation of the 1 st cylinder 31 and the 2 nd cylinder 32 may be a means capable of detecting an abnormality in the 1 st cylinder 31 and the 2 nd cylinder 32 in a stage where the 1 st rod 29 and the 2 nd rod 30 are at the initial positions. When the abnormality of either the 1 st cylinder 31 or the 2 nd cylinder 32 is detected by the detection device, the displacement of the plurality of rods is suppressed by not driving the normal cylinder.
As a result, the deviation between the plurality of rods is suppressed, the asynchronous movement of the conversion mechanism 40 is also suppressed, and the torsion of the doffing rod 20 can be suppressed by suppressing the deviation of the pantograph mechanism 21.
When the frame 11 is viewed from the front side and the 1 st bar 29 and the 2 nd bar 30 are arranged side by side without overlapping each other in the front-rear direction, the 1 st bar 29 and the 2 nd bar 30 may be shifted in at least one of the front-rear direction and the vertical direction. In this case, the respective end portions of the 1 st bar 29 and the 2 nd bar 30 located near the center in the longitudinal direction of the frame 11 may face each other partially or not entirely in the longitudinal direction of the frame 11.
When the 1 st bar 29 and the 2 nd bar 30 are deviated in at least one of the up-down direction and the front-rear direction, the rotation amount of the drive rod 41 in the position adjusting and switching mechanism 40 in the up-down direction of the pantograph mechanism 21 is adjusted to prevent the winding of the winding bar 20.
The ring spinning frame 10 may have three or more bars, and each bar may have an air cylinder.
The o-bar driving mechanism may be a hydraulic cylinder.
When the directions of reciprocation of the 1 st rod 29 and the 2 nd rod 30 are the same, the arrangement positions of the 1 st cylinder 31 and the 2 nd cylinder 32 may be changed as appropriate.
The o-bar drive mechanism may be a drive source using a ball screw.
The ring frame 10 may not have the fail-safe mechanism 50.
Technical ideas that can be grasped from the above-described embodiments and modifications are described.
(1) The spinning frame is a ring spinning frame.
Claims (5)
1. A bobbin replacing device for a spinning frame includes:
a frame machine table;
a retraction mechanism for lifting a bobbin dropping rod provided with a bobbin holding device;
a drive shaft whose axis extends in a longitudinal direction of the machine base and drives the pantograph mechanism;
a drive mechanism that reciprocates the drive shaft in an axial direction of the drive shaft; and
a rotating mechanism which makes the whole telescopic mechanism rotate to a position close to the machine platform and a position far away from the machine platform,
the rotating mechanism is provided with:
a rod having an axis extending in a long side direction of the frame table and reciprocating in the long side direction;
a rod driving mechanism that reciprocates the rod;
a control device that controls the rod driving mechanism; and
a conversion mechanism which is connected to the rod and converts the linear motion of the rod into the rotation of the whole scaling mechanism,
the bobbin replacing device of the spinning frame is characterized in that,
a plurality of the rods and the rod driving mechanism,
the plurality of rods are arranged in parallel in the long edge direction of the spinning machine table.
2. The bobbin replacing device of spinning frame as claimed in claim 1,
the rod driving mechanisms are respectively provided with a detection device for detecting whether the rod driving mechanism is abnormal, and the control device enables the rod driving mechanism which is not detected to be abnormal by the detection device not to be driven or stops driving when the detection device detects the abnormality of the rod driving mechanism.
3. The bobbin replacing device of spinning frame as claimed in claim 2,
rotating the pantograph mechanism toward a position away from the machine base by forward moving the rod from an initial position toward an operating position by the rod driving mechanism, rotating the pantograph mechanism from a position away from the machine base toward a position close to the machine base by backward moving the rod from the operating position toward the initial position by the rod driving mechanism,
after the control device performs control for driving all the rod driving mechanisms, the detection device detects an abnormality that any one of the rods is at the initial position, and when the detected abnormality continues for a predetermined time, the control device drives the rod driving mechanism for which the abnormality is not detected by the detection device and returns to the initial position.
4. The bobbin replacing device of the spinning frame according to any one of claims 1 to 3,
the plurality of bars are provided with the doffing bars, and the plurality of doffing bars are arranged in a row in the longitudinal direction of the spinning machine base.
5. The bobbin replacing device of the spinning frame according to any one of claims 1 to 4,
the spinning frame is a ring spinning frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-188069 | 2019-10-11 | ||
| JP2019188069A JP7310525B2 (en) | 2019-10-11 | 2019-10-11 | Spinning machine tube changer |
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| Publication Number | Publication Date |
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| CN112647169A true CN112647169A (en) | 2021-04-13 |
| CN112647169B CN112647169B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011057019.1A Active CN112647169B (en) | 2019-10-11 | 2020-09-30 | Bobbin replacing device of spinning frame |
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| JP (1) | JP7310525B2 (en) |
| CN (1) | CN112647169B (en) |
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| GB268407A (en) * | 1925-11-28 | 1927-03-28 | Arthur Rhodes | Improvements in doffing mechanism for spinning, doubling, twisting and like machines |
| JPH07133519A (en) * | 1993-11-10 | 1995-05-23 | Toyota Autom Loom Works Ltd | Rotary positioning mechanism of cop changer of spinning frame |
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| CN109763216A (en) * | 2017-11-10 | 2019-05-17 | 里特机械公司 | The step rail of ring spinner |
| CN109763218A (en) * | 2017-11-10 | 2019-05-17 | 里特机械公司 | Ring spinner with the spindle guide rail being displaceably supported |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0641975Y2 (en) * | 1987-06-26 | 1994-11-02 | 豊和工業株式会社 | Doughing bar tilting device for automatic pipe changer |
| DE4224436C2 (en) * | 1992-07-24 | 1996-11-14 | Zinser Textilmaschinen Gmbh | Double-sided ring spinning machine with bobbin changing device |
| DE102005042592B3 (en) * | 2005-09-07 | 2007-01-18 | Saurer Gmbh & Co. Kg | Automatic doffer for ring spinning machine has scissor lift mechanism mounted on a slide that can move at right angles to longitudinal machine axis |
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2019
- 2019-10-11 JP JP2019188069A patent/JP7310525B2/en active Active
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2020
- 2020-09-30 CN CN202011057019.1A patent/CN112647169B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB268407A (en) * | 1925-11-28 | 1927-03-28 | Arthur Rhodes | Improvements in doffing mechanism for spinning, doubling, twisting and like machines |
| CN1114693A (en) * | 1993-11-04 | 1996-01-10 | 株式会社丰田自动织机制作所 | Method of controlling operation for driving cop changer in spinning machine |
| JPH07133519A (en) * | 1993-11-10 | 1995-05-23 | Toyota Autom Loom Works Ltd | Rotary positioning mechanism of cop changer of spinning frame |
| CN1224689A (en) * | 1998-01-30 | 1999-08-04 | 村田机械株式会社 | Yarn take-up winder |
| CN109763216A (en) * | 2017-11-10 | 2019-05-17 | 里特机械公司 | The step rail of ring spinner |
| CN109763218A (en) * | 2017-11-10 | 2019-05-17 | 里特机械公司 | Ring spinner with the spindle guide rail being displaceably supported |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7310525B2 (en) | 2023-07-19 |
| JP2021063312A (en) | 2021-04-22 |
| CN112647169B (en) | 2023-11-03 |
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