Yarn feeder

Abstract

To enhance workability in fitting and removing a cover.SOLUTION: A yarn feeding device 30 comprises: a stationary part 62A (a stationary part 64A) in which a stationary-side cover member 62 (a detachable-side cover member 64) is fastened and fixed to a stationary-side housing member 52 (a detachable-side housing member 54) by fasting bolts BL2, and an engaging part 62C (an engaging part 64C) that is relatively immovably engaged with the stationary-side housing member 52 (the detachable-side housing member 54). Accordingly, at only one point for each fasting the stationary-side cover member 62 and the detachable-side cover member 64 to the housing 50, the stationary-side cover member 62 and the detachable-side cover member 64 can be fixed to the housing 50. Compared to the case where the stationary-side cover member 62 and the detachable-side cover member 64 are each fastened to the housing 50 at two points, man-hours required to attach and remove the cover 60 is reduced.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a yarn feeding device. [Background technology]

[0002] In a false-twisted composite yarn manufacturing apparatus described in Patent Document 1 below, raw yarns supplied to each spindle are overfed or drawn between a group of rollers on the upstream side and a group of rollers on the downstream side in each spindle, while being twisted and heat-set by a group of false-twisting twisters and a group of heaters to form a false-twisted yarn. In addition, the false-twisted yarns that have been false-twisted on each spindle are combined to form a false-twisted composite yarn.

[0003] The roller group is configured as a yarn feeding device that feeds the yarn. Specifically, a roller for each spindle is detachably attached to a line shaft, and the roller and a top roller grip the yarn and feed it downstream. Usually, the line shaft is rotatably supported by a bearing, and the bearing is supported by a support member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 1-132843 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, some yarn feeding devices used in false twist composite yarn manufacturing devices are equipped with a cover to prevent the yarn from being wound around the line shaft. Specifically, a cylindrical cover is attached to a support member that supports a bearing, and is disposed between the support member and the roller, covering the line shaft from the radial outside. In the yarn feeding device, the line shaft is covered over the entire axial direction by multiple covers. This makes it possible to prevent the yarn from being wound around the line shaft.

[0006] However, when a cover for preventing yarn winding is provided in the yarn feeding device, the cover needs to be removed from the support member, for example, whenever a bearing is replaced. Also, as described above, the line shaft is covered over its entire axial direction with multiple covers, so the number of covers is relatively large. Therefore, it is desirable to provide a structure for the yarn feeding device that can improve the ease of installation and removal of the covers.

[0007] SUMMARY OF THE PRESENT EMBODIMENT In consideration of the above, an object of the present invention is to provide a yarn feeding device that can improve the operability when attaching and detaching a cover. [Means for solving the problem]

[0008] One or more embodiments of the present invention are a yarn feeding device that is arranged in a yarn path of a textile machine, the yarn feeding device comprising: a rotating shaft; a bearing that rotatably supports the rotating shaft; a roller that is rotatably provided on the rotating shaft and is arranged axially outside the rotating shaft with respect to the bearing, and feeds a yarn that runs along the yarn path; a support member that supports the bearing and is composed of a pair of half support members divided in the radial direction of the rotating shaft; and a cover that is arranged between the support member and the roller, is formed in a cylindrical shape that covers the rotating shaft from the radial outside, and is composed of a pair of half cover members divided in the radial direction of the rotating shaft, one of the half cover members is connected to one of the half support members and the other of the half cover members is connected to the other of the half support members, and at least one of the pair of half cover members includes a fixing portion that is fastened and fixed to the half support member by a fastening member, and an engaging portion that engages with the half support member in the axial direction of the rotating shaft and in a direction perpendicular to the axial direction.

[0009] In the yarn feeding device having the above-mentioned configuration, the rotating shaft is rotatably supported by a bearing supported by a support member. A roller is provided on the rotating shaft so as to be rotatable integrally therewith, and the roller is disposed axially outward of the rotating shaft with respect to the bearing. A cylindrical cover is disposed between the support member and the roller, and covers the rotating shaft from the radially outward side. The support member is constituted by a pair of half support members divided in the radial direction of the rotating shaft. The cover is constituted by a pair of half cover members divided in the radial direction of the rotating shaft, one of the half cover members being connected to one of the half support members, and the other of the half cover members being connected to the other of the half support members.

[0010] Here, at least one of the pair of half cover members includes a fixing portion fastened to the half support member by a fastening member, and an engaging portion engaged with the half support member in the axial direction of the rotation shaft and in a direction perpendicular to the axial direction. That is, in at least one of the pair of half cover members, the half cover member can be fixed to the support member by fastening the half cover member to the support member at one fastening point. Therefore, for example, compared to a case in which the half cover member is fastened to the support member at two fastening points, the number of work steps required for installation and removal can be reduced. Therefore, the workability can be improved when installing and removing the cover.

[0011] In one or more embodiments of the present invention, the half-split cover member includes a semi-cylindrical cover portion that covers the rotating shaft from the radial outside, and a first flange portion provided at an end of the cover portion on the support member side, the fixing portion is provided at one circumferential end of the first flange portion, the engaging portion is provided at the other circumferential end of the first flange portion, an engaging groove is formed on an outer circumferential portion of the half-split support member, the engaging groove being open to the rotating shaft side as viewed from the axial direction and extending in a direction intersecting with the dividing surface of the support member, and the engaging portion is inserted into the engaging groove and engaged with the half-split support member so as to be immovable relative to the half-split support member.

[0012] In the yarn feeding device having the above configuration, the fixing portion is provided at one circumferential end of the first flange portion of the half cover member, and the engaging portion is provided at the other circumferential end of the first flange portion. The engaging portion is inserted into an engaging groove formed in an outer periphery of the half support member and engaged with the half support member so as to be immovable relative to the half support member. This allows the half cover member to be engaged with the half support member with a simple configuration.

[0013] One or more embodiments of the present invention are a yarn feeding device, wherein a side surface of the engagement groove facing the cover is configured as a groove-side inclined surface, which, when viewed in the longitudinal direction of the engagement groove, is inclined toward the support member as it approaches a bottom side of the engagement groove, and the engagement portion has an engagement surface that abuts against the groove-side inclined surface.

[0014] In the yarn feeding device having the above-mentioned configuration, when the engaging portion is inserted into the engaging groove, the groove-side inclined surface can move the engaging portion toward the support member. As a result, the end face of the cover can be closely attached to the side face of the support member, and the cover can be attached to the support member. Therefore, the cover can be attached to the support member in a good condition.

[0015] One or more embodiments of the present invention are a yarn feeding device in which the dividing surface of the cover is arranged flush with the dividing surface of the support member, and the angle between the dividing surface of the support member and the engagement groove is set to an acute angle when viewed in the axial direction.

[0016] In the yarn feeding device having the above-mentioned configuration, for example, by pressing one half cover member toward the engagement groove, the engagement portion moves along the engagement groove toward the other half cover member. Therefore, by fastening and fixing one half cover member in this state, the divided surfaces of the half cover members can be brought into close contact with each other. Therefore, the close contact between the half cover members can be improved.

[0017] One or more embodiments of the present invention relate to a yarn feeding device, wherein the half-split cover member has a second flange portion provided at an end of the cover portion facing the roller, a recess that is open towards the support member is formed at an end of the roller facing the support member, and the second flange portion is disposed inside the recess.

[0018] In the yarn feeding device having the above-mentioned configuration, the second flange portion of the half cover member is accommodated in the recess of the roller, so that a so-called labyrinth structure is formed between the cover and the roller. This makes it possible to prevent the yarn from entering the inside of the cover from between the cover and the roller. Therefore, it is possible to effectively prevent the yarn from being wound around the rotating shaft. Effect of the Invention

[0019] According to one or more embodiments of the present invention, the ease of installation and removal of the cover can be improved. [Brief description of the drawings]

[0020] [Figure 1] 1 is a side view showing a schematic diagram of a false twisting machine to which a yarn feeding device according to an embodiment of the present invention is applied. [Diagram 2] 2 is a front view showing a part of the first yarn feeding device shown in FIG. 1, as viewed from the front side. [Diagram 3] 3 is a cross-sectional view of the first yarn feeding device shown in FIG. 2 as viewed from the right side (cross-sectional view taken along line 3-3 in FIG. 2). [Figure 4] 4 is an enlarged cross-sectional view showing a portion of the first yarn feeding device shown in FIG. 3 in front of a base. FIG. [Diagram 5] 5 is a cross-sectional view (cross-sectional view taken along line 5-5 in FIG. 3) seen from above of the first yarn feeding device shown in FIG. 3. [Figure 6] 3 is an exploded perspective view of a housing and a cover in the first yarn feeding device shown in FIG. 2. FIG. [Figure 7]4A is a cross-sectional view (cross-sectional view taken along line 7A-7A in FIG. 4) showing the engagement state between the engagement portion of the detachable side cover member and the engagement groove portion of the detachable side housing member shown in FIG. 4, and FIG. 4B is a cross-sectional view (cross-sectional view taken along line 7B-7B in FIG. 4) showing the engagement state between the engagement portion of the fixed side cover member and the engagement groove portion of the fixed side housing member shown in FIG. 4. [Figure 8] 11 is a front view illustrating a procedure for replacing a bearing of the first yarn feeding device. [Figure 9] 7(B) for explaining a modified example of the engagement portion of the fixed-side cover member and the engagement groove portion of the fixed-side housing member. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The yarn feeding device 30 according to this embodiment will be described below with reference to the drawings. The yarn feeding device 30 is applied to a false twisting machine 10 as a textile machine, which is a device that produces a false twist textured yarn (DTY: Draw Textured Yarn) by false twisting a partially oriented yarn (POY: Partially Oriented Yarn). Four yarn feeding devices 30 are used in the false twisting machine 10, and in order to distinguish between the four yarn feeding devices 30, the four yarn feeding devices 30 will be described below as a first yarn feeding device 30-1, a second yarn feeding device 30-2, a third yarn feeding device 30-3, and a fourth yarn feeding device 30-4.

[0022] (Overall configuration of the false twisting machine 10) As shown in Fig. 1, the false twisting machine 10 includes a main machine base 12, a winding device 14, and a yarn supplying creel 16. The main machine base 12, the winding device 14, and the yarn supplying creel 16 are arranged side by side with a predetermined space therebetween in the width direction of the false twisting machine 10 (the directions of arrows A and B in Fig. 1). A first yarn feeding device 30-1 is provided above the winding device 14, a second yarn feeding device 30-2 and a third yarn feeding device 30-3 are provided on the upper part of the main machine base 12, and a fourth yarn feeding device 30-4 is provided on the lower end part of the main machine base 12. The first yarn feeding device 30-1 to the fourth yarn feeding device 30-4 feed the yarn Y supplied from the yarn supplying creel 16 along the yarn path 18 to the winding device 14. In this embodiment, a plurality of yarns Y are supplied from the yarn supplying creel 16, and the yarns Y supplied from the yarn supplying creel 16 are fed downstream by the first yarn feeding device 30-1.

[0023] The yarn feeding speed of the second yarn feeding device 30-2 is set to be faster than the yarn feeding speed of the first yarn feeding device 30-1. As a result, the yarn Y is drawn between the first yarn feeding device 30-1 and the second yarn feeding device 30-2. In addition, a first heater 20, a cooling device 22, and a false twist device 24 are provided between the first yarn feeding device 30-1 and the second yarn feeding device 30-2 in this order from the upstream side. As a result, the yarn Y is subjected to a false twist process by passing through the false twist device 24.

[0024] In addition, a second heater 26 is provided between the third yarn feeding device 30-3 and the fourth yarn feeding device 30-4, and the yarn Y combined between the second yarn feeding device 30-2 and the third yarn feeding device 30-3 is fed to the second heater 26 by the third yarn feeding device 30-3. The yarn Y is then fed to the winding device 14 by the fourth yarn feeding device 30-4, and wound by the winding device 14 provided in the winding device 14 to form a package P.

[0025] (Regarding the yarn feeding device 30) Since the first yarn feeding device 30-1 to the fourth yarn feeding device 30-4 have the same configuration, the configuration of the yarn feeding device 30 will be described using the first yarn feeding device 30-1.

[0026] The configuration of the first yarn feeding device 30-1 will be described below with reference to Figs. 2 to 7. The arrows UP, FP, and RH shown in the drawings indicate the upper side, front side, and right side of the first yarn feeding device 30-1, respectively. In the following description, when the up-down, front-rear, and left-right directions are used, they refer to the up-down, front-rear, and left-right directions of the first yarn feeding device 30-1 unless otherwise specified. The left-right direction of the first yarn feeding device 30-1 coincides with the left-right direction of the false twisting machine 10 (the direction perpendicular to the paper surface of Fig. 1), and this left-right direction is perpendicular to the up-down and width directions of the false twisting machine 10.

[0027] As shown in Figures 2 to 5, the first yarn feeding device 30-1 includes a base 32, a shaft 34 as a rotating shaft, a plurality of bearings 36 supporting the shaft 34, a housing 50 as a support member supporting the bearings 36, a plurality of drive rollers 38 as rollers, a plurality of driven rollers 40, and a plurality of covers 60.

[0028] The base 32 is formed in a substantially rectangular tubular shape extending in the left-right direction. The base 32 functions as a member for fixing the first yarn sending device 30-1 to a framework member (frame) of the false twisting machine 10. The shaft 34 is formed in a substantially cylindrical shape with the left-right direction as its axial direction, and is disposed on the front side of the base 32. The shaft 34 is rotatably supported by a bearing 36. The bearing 36 is configured as a ball bearing, and is supported by a housing 50 (described later) and connected to the base 32 by the housing 50. The multiple bearings 36 are disposed at predetermined intervals in the left-right direction (only one bearing 36 is illustrated in Figs. 3 to 5). A motor (not shown) is connected to one end of the shaft 34 in the longitudinal direction, and the shaft 34 rotates about its own axis when driven by the motor.

[0029] The driving roller 38 is configured as a metal roller and is formed in a substantially cylindrical shape with the left-right direction as the axial direction. At both left-right ends of the driving roller 38, a recess 38A (see FIG. 5) that is open outward in the left-right direction is formed, and the recess 38A is formed in a circular shape when viewed in the left-right direction. The driving roller 38 is disposed on the axial outer side of the shaft 34 with respect to the bearing 36, and is fixed to the shaft 34 so as to be rotatable together with the shaft 34 (in the example shown in FIGS. 3 to 5, the driving roller 38 is disposed on both axial sides of the shaft 34 with respect to the bearing 36). The driving roller 38 is fixed to the shaft 34 by a hexagon socket set screw at a position not shown.

[0030] The driven roller 40 is a rubber roller and is paired with the drive roller 38. That is, the drive roller 38 and the driven roller 40 form a feed roller pair 42. The driven roller 40 is disposed above the drive roller 38, is supported by a support mechanism 44 so as to be rotatable about the left-right direction as an axial direction, and is connected to the base 32. The driven roller 40 is configured to be movable toward and away from the drive roller 38 by the support mechanism 44. That is, when the driven roller 40 is in a position close to the drive roller 38, the yarn Y is sandwiched between the drive roller 38 and the driven roller 40 to feed the yarn Y downstream. On the other hand, when replacing the bearing 36, the driven roller 40 is moved upward to be separated from the drive roller 38.

[0031] 2 to 6, the housing 50 is formed in a generally cylindrical shape with the left-right direction as the axial direction as a whole. That is, the housing 50 has a circular support hole 50A (see FIG. 6) penetrating in the left-right direction. The housing 50 is disposed on the front side of the base 32, and is configured as a support member that supports the bearing 36 from the radially outer side. That is, the housing 50 is paired with the bearing 36, and supports the shaft 34 via the bearing 36.

[0032] The housing 50 is configured to include a fixed-side housing member 52 and a detachable-side housing member 54 as half support members divided into two in the radial direction of the shaft 34. Specifically, a dividing surface 50B of the housing 50 extends along a direction that slopes downward toward the front when viewed from the left-right direction. Hereinafter, the direction in which the housing 50 is divided when viewed from the left-right direction is referred to as the dividing direction (see arrows C and D in Figs. 4 and 6).

[0033] The fixed-side housing member 52 constitutes one side in the dividing direction of the housing 50 (the side indicated by the arrow C in Figs. 4 and 6). The fixed-side housing member 52 is disposed in front of the base 32 and is fastened and fixed to the base 32 at a position not shown.

[0034] The fixed side housing member 52 has a fixing screw portion 52B (see FIG. 6) for fixing the detachable side housing member 54 formed on each of the divided surfaces 50B. The fixing screw portion 52B is formed in a concave shape that is open toward the other side in the division direction, and a female screw is formed on the inner peripheral surface of the fixing screw portion 52B. The fixed side housing member 52 has a cover fixing screw portion 52C (see FIG. 6) for fixing a cover 60 (fixed side cover member 62) described later formed on both left and right side surfaces of the front end portion of the fixed side housing member 52 (only the cover fixing screw portion 52C formed on the right side surface of the fixed side housing member 52 is shown in FIG. 6). The cover fixing screw portion 52C is formed in a concave shape that is open toward the outside in the left and right direction, and a female screw is formed on the inner peripheral surface of the cover fixing screw portion 52C.

[0035] Furthermore, a step portion 52D is formed on each of the left and right side surfaces of the rear end of the fixed-side housing member 52, which is raised one step outward in the left and right direction. The front end of the step portion 52D extends along the up-down direction (the direction intersecting the dividing surface 50B) when viewed from the left and right direction. An engagement groove 52E is formed in the front end of the step portion 52D, and the engagement groove 52E extends along the front end of the step portion 52D and penetrates in the extending direction. An angle AG1 (see FIG. 4) between the engagement groove 52E and the dividing surface 50B when viewed from the left and right direction is set to an acute angle. When viewed from the longitudinal direction, the engagement groove 52E is formed in a substantially wedge shape that is open toward the shaft 34 side. Specifically, as shown in FIG. 7(B), a side surface on one side in the width direction of the engagement groove 52E (side surface on the inner side in the left and right direction) is configured as a receiving surface 52E1, and the receiving surface 52E1 is arranged along a direction perpendicular to the left and right direction when viewed from the longitudinal direction of the engagement groove 52E. Further, the side surface on the other width direction side of the engagement groove 52E (the side surface on the outer side in the left-right direction) is configured as a groove-side inclined surface 52E2, which is inclined toward the shaft 34 as it moves outward in the left-right direction when viewed from the longitudinal direction of the engagement groove 52E. That is, the groove-side inclined surface 52E2 configures the side surface on the outer side in the left-right direction of the engagement groove 52E (the side of the cover 60 described later), and is inclined inward in the left-right direction (the side of the housing 50) as it moves toward the bottom of the engagement groove 52E. The receiving surface 52E1 is disposed flush with both the left and right side surfaces of the fixed-side housing member 52.

[0036] As shown in Figs. 2 to 6, the detachable-side housing member 54 constitutes the other side in the division direction of the housing 50. At the front and rear ends of the detachable-side housing member 54, fixing holes 54A (see Fig. 6) are formed penetrating in the division direction, and fixing bolts BL1 inserted into the fixing holes 54A are screwed into fixing screw portions 52B of the fixed-side housing member 52, thereby fixing the detachable-side housing member 54 to the fixed-side housing member 52. In other words, the detachable-side housing member 54 is detachably fixed to the fixed-side housing member 52 and supports the bearing 36 from the other side in the division direction. When replacing the bearing 36, the detachable-side housing member 54 is removed from the fixed-side housing member 52.

[0037] A cover fixing screw portion 54C (see FIG. 6) for fixing a cover 60 described later is formed on both left and right side surfaces of the front end portion of the detachable housing member 54, and the cover fixing screw portion 54C is disposed at a position symmetrical with respect to the dividing surface 50B of the housing 50 when viewed from the left and right direction (FIG. 6 shows only the cover fixing screw portion 54C formed on the right side surface of the detachable housing member 54). The cover fixing screw portion 54C is formed in a concave shape that is open outward in the left and right direction, and a female thread is formed on the inner peripheral surface of the cover fixing screw portion 54C.

[0038] Further, a step portion 54D is formed on each of the left and right side surfaces of the rear end of the detachable housing member 54, which is raised one step outward in the left and right direction. The front end of the step portion 54D extends symmetrically with the step portion 52D of the fixed housing member 52 with respect to the dividing surface 50B of the housing 50 when viewed from the left and right direction. More specifically, the front end of the step portion 54D extends in a direction that inclines forward as it moves upward (a direction that intersects with the dividing surface 50B) when viewed from the left and right direction. An engagement groove 54E is formed in the front end of the step portion 54D, and the engagement groove 54E extends along the front end of the step portion 54D and penetrates in the extending direction. When viewed from the left and right direction, an angle AG2 (see FIG. 4) between the engagement groove 54E and the dividing surface 50B is set to be the same as the angle AG1. When viewed from the longitudinal direction, the engagement groove 54E is formed in a substantially wedge shape that is open toward the shaft 34 side. Specifically, as shown in FIG. 7A, a side surface on one side in the width direction of the engagement groove 54E (side surface on the inner side in the left-right direction) is configured as a receiving surface 54E1, and the receiving surface 54E1 is disposed along a direction perpendicular to the left-right direction as viewed from the longitudinal direction of the engagement groove 54E. Also, a side surface on the other side in the width direction of the engagement groove 54E (side surface on the outer side in the left-right direction) is configured as a groove-side inclined surface 54E2, and the groove-side inclined surface 54E2 is inclined toward the shaft 34 side as it moves toward the outer side in the left-right direction as viewed from the longitudinal direction of the engagement groove 54E. That is, the groove-side inclined surface 54E2 constitutes a side surface on the outer side in the left-right direction of the engagement groove 54E (the side of the cover 60 described later), and is inclined toward the inner side in the left-right direction (the side of the housing 50) as it moves toward the bottom of the engagement groove 54E. The receiving surface 54E1 is disposed flush with both the left and right side surfaces of the detachable-side housing member 54.

[0039] 2 to 6, the cover 60 is disposed between the housing 50 and the drive roller 38, and is configured as a member that covers the radial outside of the shaft 34. For this reason, the cover 60 is provided on the radial outside of the shaft 34, paired with the drive roller 38.

[0040] The cover 60 is generally formed in a substantially cylindrical shape with the left-right direction as the axial direction. Specifically, the cover 60 includes a cylindrical cover portion 60A, a substantially annular plate-shaped first flange portion 60B extending radially outward from the end of the cover portion 60A on the housing 50 side, and a substantially annular plate-shaped second flange portion 60C extending radially outward from the end of the cover portion 60A on the drive roller 38 side. The first flange portion 60B of the cover 60 is fixed to the side of the housing 50, and the cover 60 extends from the housing 50 to the axially outward direction of the shaft 34 to cover the portion of the shaft 34 between the bearing 36 and the drive roller 38 from the radially outward direction. When the cover 60 is fixed to the housing 50, the second flange portion 60C is accommodated in the recess 38A of the drive roller 38. This prevents the yarn Y from entering inside the cover 60, and the cover 60 prevents the yarn Y from winding around the portion of the shaft 34 between the bearing 36 and the drive roller 38.

[0041] The cover 60 is composed of a fixed-side cover member 62 and a detachable-side cover member 64 as half cover members divided in two in the radial direction of the shaft 34. The fixed-side cover member 62 and the detachable-side cover member 64 are divided in two in the division direction, and the division position of the cover 60 is set so that a division surface 60D of the cover 60 and a division surface 50B of the housing 50 in the division direction coincide with each other. The fixed-side cover member 62 is detachably fixed to the fixed-side housing member 52 of the housing 50, and the detachable-side cover member 64 is detachably fixed to the detachable-side housing member 54.

[0042] One circumferential end (front end) of the first flange portion 60B of the fixed-side cover member 62 is configured as a fixed portion 62A, and a fixing hole 62B (see FIG. 6) is formed through the fixed portion 62A at a position corresponding to the cover fixing screw portion 52C of the fixed-side housing member 52. A fastening bolt BL2 as a fastening member inserted into the fixing hole 62B is screwed into the cover fixing screw portion 52C of the fixed-side housing member 52, and the fixed-side cover member 62 is fastened and fixed to the fixed-side housing member 52. That is, the fixed portion 62A is fixed to the fixed-side housing member 52 by the fastening bolt BL2 arranged parallel to the shaft 34.

[0043] An engagement portion 62C is formed on the outer periphery of the first flange portion 60B at the other circumferential end (rear end) of the first flange portion 60B. The engagement portion 62C corresponds to the engagement groove 52E of the fixed-side housing member 52 and extends along the extension direction of the engagement groove 52E when viewed from the left-right direction. When viewed from the longitudinal direction, the engagement portion 62C is formed in a wedge shape corresponding to the engagement groove 52E. That is, as shown in FIG. 7B, when viewed from the longitudinal direction, the engagement portion 62C includes a first engagement surface 62C1 arranged along a direction perpendicular to the left-right direction, and a second engagement surface 62C2 as an engagement surface inclined toward the shaft 34 side as it moves from the rear end of the first engagement surface 62C1 toward the outside in the left-right direction. Then, the engagement portion 62C is inserted into the engagement groove 52E, and the engagement portion 62C and the engagement groove 52E are engaged with each other. Specifically, the first engagement surface 62C1 abuts against the receiving surface 52E1, and the second engagement surface 62C2 abuts against the groove-side inclined surface 52E2. As a result, the engagement portion 62C engages with the engagement groove 52E in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction, and is connected to the fixed-side housing member 52 so as not to move relatively. The first engagement surface 62C1 is disposed flush with the end face of the fixed-side cover member 62.

[0044] As shown in Figs. 2 to 6, the detachable-side cover member 64 is configured to be symmetrical to the fixed-side cover member 62 with respect to the dividing surface 60D of the cover 60. That is, one circumferential end (front end) of the first flange portion 60B of the detachable-side cover member 64 is configured as a fixing portion 64A, and a fixing hole 64B (see Fig. 6) is formed through the fixing portion 64A at a position corresponding to the cover fixing screw portion 54C of the detachable-side housing member 54. Then, a fastening bolt BL2 inserted into the fixing hole 64B is screwed into the cover fixing screw portion 54C of the detachable-side housing member 54, so that the detachable-side cover member 64 is fastened and fixed to the detachable-side housing member 54. That is, the fixing portion 64A is fixed to the detachable-side housing member 54 by the fastening bolt BL2 arranged parallel to the shaft 34.

[0045] An engagement portion 64C is formed on the outer periphery of the first flange portion 60B at the other circumferential end (rear end) of the first flange portion 60B of the detachable side cover member 64. The engagement portion 64C corresponds to the engagement groove 54E of the detachable side housing member 54 and extends along the extension direction of the engagement groove 54E when viewed from the left-right direction. When viewed from the longitudinal direction, the engagement portion 64C is formed in a wedge shape corresponding to the engagement groove 54E. That is, as shown in FIG. 7(A), when viewed from the longitudinal direction, the engagement portion 64C includes a first engagement surface 64C1 along a direction perpendicular to the left-right direction, and a second engagement surface 64C2 inclined toward the shaft 34 side as it moves from the rear end of the first engagement surface 64C1 toward the outside in the left-right direction. Then, the engagement portion 64C is inserted into the engagement groove 54E, and the engagement portion 64C and the engagement groove 54E are engaged with each other. Specifically, the first engagement surface 64C1 abuts against the receiving surface 54E1, and the second engagement surface 64C2 abuts against the groove-side inclined surface 54E2. As a result, the engagement portion 64C engages with the engagement groove 54E in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction, and is connected to the detachable-side housing member 54 so as not to move relatively. The first engagement surface 64C1 is disposed flush with the end face of the detachable-side cover member 64.

[0046] (Action and effect) Next, the procedure for replacing the bearing 36 in the first yarn sending device 30-1 will be described with reference to FIG. 8, while the operation and effects of this embodiment will be described.

[0047] When the yarn Y is fed by the first yarn feeding device 30-1, the driven roller 40 is disposed at a position close to the driving roller 38 and is located on the other side of the division direction relative to the driving roller 38 (see the state of (1) in FIG. 8). Therefore, when replacing the bearing 36, the driven roller 40 is separated from the driving roller 38 and is disposed so that the driven roller 40 is not located on the other side of the division direction relative to the housing 50 (see the state of (2) in FIG. 8).

[0048] Next, the fastening state of the fixing bolt BL1 in the housing 50 is released, and the detachable-side housing member 54 and the detachable-side cover member 64 are moved to the other side in the division direction to be removed from the fixed-side housing member 52. As a result, the bearing 36 is exposed (see the state of (3) in FIG. 8). The second flange portion 60C of the cover 60 is accommodated in the recess 38A of the drive roller 38. Therefore, when the detachable-side housing member 54 and the detachable-side cover member 64 are moved to the other side in the division direction, the second flange portion 60C interferes with the drive roller 38. Therefore, one of the detachable-side cover members 64 on both the left and right sides of the detachable-side housing member 54 is removed from the detachable-side housing member 54. That is, the fastening state of the fastening bolt BL2 is released. In this state, the attitude of the detachable-side cover member 64 is tilted with respect to the drive roller 38 to cause the second flange portion 60C to fall off from the recess 38A of the drive roller 38. As a result, one of the detachable-side cover members 64 is detached from the detachable-side housing member 54. Then, by moving the other of the detachable-side cover members 64 and the detachable-side housing member 54 toward the one of the detachable-side housing members 54 that was removed, the second flange portion 60C of the other of the detachable-side cover members 64 falls out of the recess 38A of the drive roller 38. Thus, the other of the detachable-side housing member 54 and the detachable-side cover member 64 can be removed from the fixed-side housing member 52.

[0049] Next, one of the fixed-side cover members 62 on either the left or right side of the fixed-side housing member 52 is removed from the fixed-side housing member 52 (see the state in FIG. 8(4)). That is, the fastening bolt BL2 is released, and the fixed-side cover member 62 is tilted relative to the drive roller 38 while the second flange portion 60C falls off the recess 38A of the drive roller 38. This causes the fixed-side cover member 62 to come off from the fixed-side housing member 52. In the state shown in FIG. 8(4), the right-side fixed-side cover member 62 has been removed from the fixed-side housing member 52.

[0050] Next, by sliding the shaft 34 to the left, the drive roller 38 slides to the left together with the shaft 34. This releases the drive roller 38 from the recess 38A in the second flange portion 60C of the left detachable-side cover member 64. In this state, the shaft 34 is moved to the other side in the division direction and removed from the fixed-side housing member 52. This allows the bearing 36 to be replaced.

[0051] After replacing the bearing 36, the shaft 34 is attached to the housing 50 by reversing the above procedure.

[0052] Thus, when replacing the bearing 36, for example, it is necessary to remove the fixed side cover member 62 (detachable side cover member 64) from the fixed side housing member 52 (detachable side housing member 54) and to attach the fixed side cover member 62 (detachable side cover member 64) to the fixed side housing member 52 (detachable side housing member 54).

[0053] Here, the fixed side cover member 62 (detachable side cover member 64) is configured to include a fixed portion 62A (fixed portion 64A) fastened and fixed to the fixed side housing member 52 (detachable side housing member 54) by a fastening bolt BL2, and an engaging portion 62C (engaging portion 64C) engaged with the fixed side housing member 52 (detachable side housing member 54) in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction. That is, the fixed side cover member 62 and the detachable side cover member 64 can be fixed to the housing 50 at one fastening point. Therefore, for example, compared with the case where the fixed side cover member 62 and the detachable side cover member 64 are fastened to the housing 50 at two fastening points, the number of work steps at the time of attachment and detachment can be reduced. Therefore, the workability at the time of attachment and detachment of the cover 60 can be improved. Furthermore, the fixed side cover member 62 and the detachable side cover member 64 are fastened to the housing 50 at only one location, which contributes to a reduction in the number of parts.

[0054] As described above, the engaging portion 62C of the fixed-side cover member 62 engages with the engaging groove 52E of the fixed-side housing member 52 in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction, and the engaging portion 64C of the detachable-side cover member 64 engages with the engaging groove 54E of the detachable-side housing member 54 in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction. This allows the engaging portion 62C (engaging portion 64C) to function as a rotation stopper when the fixed-side cover member 62 (detachable-side cover member 64) is fastened and fixed to the housing 50, while also functioning as a fixing portion to the housing 50.

[0055] The fixed-side cover member 62 (detachable-side cover member 64) includes a cover portion 60A that covers the shaft 34 from the radial outside, and a first flange portion 60B provided at the housing 50 side end of the cover portion 60A. The fixed-side cover member 62 (detachable-side cover member 64) has a fixed portion 62A (fixed portion 64A) provided at the front end (one circumferential end) of the first flange portion 60B, and an engaging portion 62C (engaging portion 64C) provided at the rear end (other circumferential end) of the first flange portion 60B. The engaging portion 62C (engaging portion 64C) is inserted into an engaging groove 52E (engaging groove 54E) formed on the outer periphery of the fixed-side housing member 52 (detachable-side housing member 54) and engaged so as to be immovable relative to the fixed-side housing member 52. This makes it possible to engage the fixed-side cover member 62 (the detachable-side cover member 64) with the fixed-side housing member 52 (the detachable-side housing member 54) with a simple configuration.

[0056] In addition, the side surface of the engagement groove 52E (engagement groove 54E) of the housing 50 on the cover 60 side is configured as a groove-side inclined surface 52E2 (groove-side inclined surface 54E2), and the groove-side inclined surface 52E2 (groove-side inclined surface 54E2) is inclined toward the housing 50 side as it approaches the bottom side of the engagement groove 52E (engagement groove 54E) when viewed in the longitudinal direction of the engagement groove 52E. Furthermore, the engagement portion 62C (engagement portion 64C) of the cover 60 has a second engagement surface 62C2 (second engagement surface 64C2) that abuts against the groove-side inclined surface 52E2 (groove-side inclined surface 54E2). As a result, when the engagement portion 62C (engagement portion 64C) is inserted into the engagement groove 52E (engagement groove 54E), the groove-side inclined surface 52E2 (groove-side inclined surface 54E2) can bring the engagement portion 62C (engagement portion 64C) closer to the housing 50 side. As a result, the cover 60 can be attached to the housing 50 with the end face of the cover 60 facing the housing 50 tightly attached to the left and right side faces of the housing 50. This makes it possible to ensure a good attachment state of the cover 60 to the housing 50.

[0057] In addition, the divided surface 60D of the cover 60 is disposed flush with the divided surface 50B of the housing 50, and the angle AG1 (angle AG2) between the divided surface 50B of the housing 50 and the engagement groove 52E (engagement groove 54E) is set to an acute angle when viewed from the axial direction of the shaft 34. This allows the detachable-side cover member 64 to be fixed to the detachable-side housing member 54 with the divided surfaces 60D of the fixed-side cover member 62 and the detachable-side cover member 64 in close contact with each other. That is, for example, the detachable-side cover member 64 is temporarily fixed to the detachable-side housing member 54 by the fastening bolt BL2, and in this state, the detachable-side housing member 54 is fixed to the fixed-side housing member 52 by the fastening bolt BL1. After this, the fastening bolt BL2 is finally tightened. At this time, the engagement portion 64C can be moved toward the fixed-side cover member 62 along the engagement groove 54E by the rotation moment generated in the detachable-side cover member 64. This allows the divided surfaces 60D of the fixed-side cover member 62 and the detachable-side cover member 64 to be brought into close contact with each other, thereby fixing the detachable-side cover member 64 to the detachable-side housing member 54. Also, for example, when the fastening bolt BL2 is fully tightened, the worker presses the detachable-side cover member 64 toward the rear side (the engagement groove 54E side), so that the engagement portion 64C moves toward the fixed-side cover member 62 along the engagement groove 54E. Therefore, even in this case, the divided surfaces 60D of the fixed-side cover member 62 and the detachable-side cover member 64 can be brought into close contact with each other, thereby fixing the detachable-side cover member 64 to the detachable-side housing member 54. Therefore, the close contact between the fixed-side cover member 62 and the detachable-side cover member 64 can be improved.

[0058] In addition, the fixed side cover member 62 and the detachable side cover member 64 have a second flange portion 60C provided at the end of the cover portion 60A on the drive roller 38 side, and a recess 38A that is open to the housing 50 side is formed at the end of the drive roller 38 on the housing 50 side. The second flange portion 60C is accommodated inside the recess 38A. This forms a so-called labyrinth structure between the cover 60 and the drive roller 38. This makes it possible to prevent the thread Y from entering the inside of the cover 60 from between the cover 60 and the drive roller 38. This makes it possible to effectively prevent the thread Y from winding around the shaft 34.

[0059] In this embodiment, the fixed-side cover member 62 is provided with an engaging portion 62C, and the detachable-side cover member 64 is provided with an engaging portion 64C, so that the fixed-side cover member 62 and the detachable-side cover member 64 are fastened at one location, but the fixed-side cover member 62 or the detachable-side cover member 64 may be fastened at two locations. That is, a fastening portion may be provided instead of an engaging portion on one of the fixed-side cover member 62 and the detachable-side cover member 64. Even in this case, the other of the fixed-side cover member 62 and the detachable-side cover member 64 still has one fastening location, so that the workability of attaching and removing the other of the fixed-side cover member 62 and the detachable-side cover member 64 can be improved.

[0060] In particular, when the engaging portion 64C is provided only on the detachable-side cover member 64, for example, the fixed-side cover member 62 may be configured to be formed integrally with the fixed-side housing member 52. In this case, in a state in which the detachable-side housing member 54 and the detachable-side cover member 64 are removed from the fixed-side housing member 52 (the state of FIG. 8 (3)), the drive roller 38 is released from the shaft 34 and the drive roller 38 is slid relative to the shaft 34, whereby the shaft 34 can be removed from the housing 50 while suppressing interference between the drive roller 38 and the second flange portion 60C of the fixed-side cover member 62.

[0061] In this embodiment, the engagement groove 52E of the housing 50 and the engagement portion 62C of the fixed-side cover member 62 are formed in a substantially wedge shape when viewed from the longitudinal direction, and the engagement groove 52E and the engagement portion 62C engage with each other in the axial direction of the shaft 34 and in a direction perpendicular to the axial direction (hereinafter referred to as the perpendicular direction). That is, the groove-side inclined surface 52E2 of the engagement groove 52E and the second engagement surface 62C2 of the engagement portion 62C function as a portion that engages the engagement groove 52E and the engagement portion 62C in a direction perpendicular to the portion that engages with the axial direction of the shaft 34. Similarly, the groove-side inclined surface 54E2 of the engagement groove 54E of the housing 50 and the second engagement surface 64C2 of the engagement portion 64C of the detachable-side cover member 64 function as a portion that engages the engagement groove 54E and the engagement portion 64C in a direction perpendicular to the portion that engages with the axial direction of the shaft 34. Alternatively, the shapes of the engagement groove 52E (engagement groove 54E) and the engagement portion 62C (engagement portion 64C) may be changed so that the engagement between the engagement groove 52E (engagement groove 54E) and the engagement portion 62C (engagement portion 64C) is divided into a portion that engages in the axial direction of the shaft 34 and a portion that engages in the perpendicular direction. Hereinafter, the change in the shapes of the engagement groove 52E (engagement groove 54E) and the engagement portion 62C (engagement portion 64C) will be described using the engagement groove 52E and the engagement portion 62C.

[0062] That is, as shown in FIG. 9, the engagement groove 52E of the modified example is formed in the left-right direction inner part of the front end of the step portion 52D, and is formed in a concave shape that is open to the shaft 34 side when viewed in the longitudinal direction. Specifically, the engagement groove 52E includes an inner groove surface 52E3, a bottom surface 52E4 that extends outward in the left-right direction from the rear end of the inner groove surface 52E3, and an outer groove surface 52E5 that extends forward from the outer end of the bottom surface 52E4 in the left-right direction. The inner groove surface 52E3 is disposed flush with both the left and right side surfaces of the fixed-side housing member 52, similar to the receiving surface 52E1 of the present embodiment. In addition, the inner groove surface 52E3 and the outer groove surface 52E5 are formed along a plane perpendicular to the left-right direction.

[0063] The engagement portion 62C of the modified example is formed in a substantially rectangular shape corresponding to the engagement groove 52E when viewed from the longitudinal direction. Specifically, the engagement portion 62C includes an inner engagement surface 62C3, a tip surface 62C4 extending outward in the left-right direction from the rear end of the inner engagement surface 62C3, and an outer engagement surface 62C5 extending forward from the tip surface 62C4. The inner engagement surface 62C3 is disposed flush with the end surface of the fixed-side cover member 62, similar to the first engagement surface 62C1 of the present embodiment. In addition, the inner engagement surface 62C3 and the outer engagement surface 62C5 are formed along a surface perpendicular to the left-right direction. Then, the engagement portion 62C fits into the engagement groove 52E, so that the engagement groove 52E and the engagement portion 62C engage with the shaft 34 in the axial direction and the perpendicular direction. That is, the inner groove surface 52E3 and the outer groove surface 52E5 of the engagement groove 52E and the inner engagement surface 62C3 and the outer engagement surface 62C5 of the engagement portion 62C correspond to a portion that engages in the axial direction of the shaft 34. Also, the bottom surface 52E4 of the engagement groove 52E and the tip surface 62C4 of the engagement portion 62C correspond to a portion that engages in the perpendicular direction. This allows the engagement portion 62C (engagement portion 64C) of the fixed-side cover member (detachable-side cover member 64) to be fixed to the housing 50, similarly to the present embodiment.

[0064] In addition, in this embodiment, the yarn feeding device 30 is applied to the false twisting machine 10, but the yarn feeding device 30 may be applied to a textile machine for producing POY, or may be applied to a textile machine for producing fully drawn yarn (FDY: Fully Draw Yarn). [Explanation of symbols]

[0065] 10. False twisting machine (textile machinery) 18 Thread Path 30 Yarn feeding device 30-1 First yarn feeding device 30-2 Second yarn feeding device 30-3 Third yarn feed device 30-4 Fourth yarn feed device 34 Shaft (rotating axis) 36 Bearings 38 Drive roller (roller) 38A Recess 50 Housing (support member) 52 Fixed side housing member (half support member) 52E Engagement groove 52E2 Groove side slope 54 Detachable housing member (half support member) 54E Engagement groove 54E2 Groove side slope 60 Cover 60A Cover 60B First flange part 60C Second flange part 62 Fixed side cover member (half cover member) 62A Fixed part 62C Engagement part 62C2 Second engagement surface (engagement surface) 64 Detachable side cover member (half cover member) 64A Fixed part 64C Engagement part 64C2 Second engagement surface (engagement surface) AG1 angle AG2 angle BL2 Fastening bolt (fastening member)

Claims

1. A yarn feeding device positioned in the yarn path of a textile machine, The axis of rotation and A bearing that rotatably supports the aforementioned rotating shaft, A roller is provided so as to be rotatable integrally with the aforementioned rotating shaft, and is positioned axially outward from the bearing of the rotating shaft, and feeds the thread that travels along the thread path. A support member that supports the bearing and is composed of a pair of split support members divided radially in the direction of the rotating shaft, A cover is positioned between the support member and the roller, formed in a cylindrical shape to cover the rotating shaft from the radially outer direction, and composed of a pair of split cover members divided radially in the direction of the rotating shaft. Equipped with, One half of the split cover member is connected to one half of the split support member, and the other half of the split cover member is connected to the other half of the split support member. At least one of the pair of the aforementioned split cover members is A fixing portion fastened and secured to the split support member by a fastening member, The split support member has an engaging portion that engages with the rotation axis in the axial direction and in a direction perpendicular to the axial direction, A thread feeding device comprising the following components.

2. The aforementioned split cover member is composed of a semi-cylindrical cover portion that covers the rotating shaft from the radially outer side, and a first flange portion provided at the end of the cover portion on the support member side. The fixing portion is provided at one circumferential end of the first flange portion, and the engaging portion is provided at the other circumferential end of the first flange portion. An engagement groove is formed on the outer circumference of the aforementioned split support member, which, when viewed from the axial direction, is open toward the rotation axis and extends in a direction intersecting the split surface of the support member. The thread feeding device according to claim 1, wherein the engaging portion is inserted into the engaging groove and engaged with the split support member in a manner that prevents relative movement.

3. The side surface of the engagement groove on the cover side is configured as a groove-side inclined surface, and the groove-side inclined surface, when viewed from the longitudinal direction of the engagement groove, is inclined toward the support member side as it approaches the bottom side of the engagement groove. The thread feeding device according to claim 2, wherein the engaging portion has an engaging surface that contacts the groove-side inclined surface.

4. The thread feeding device according to claim 2 or 3, wherein the dividing surface of the cover is arranged flush with the dividing surface of the support member, and the angle between the dividing surface of the support member and the engagement groove is set to an acute angle when viewed from the axial direction.

5. The aforementioned split cover member has a second flange portion provided at the roller-side end of the cover portion, The end of the roller on the support member side has a recess formed that is open to the support member side. The thread feeding device according to claim 2 or claim 3, wherein the second flange portion is located inside the recess.

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