Fiber bundle collector for spinning machine

Abstract

To provide a fiber bundle collector in a spinning machine capable of suppressing an intrusion of foreign matter between a counter shaft and a delivery bottom roller.SOLUTION: In a fiber bundle collector 20, a counter shaft 30 rotates in the same rotational direction as a front bottom roller 112, and the rotation of the counter shaft 30 is transmitted to a delivery bottom roller 23 via a power transmission device 40 so that the delivery bottom roller 23 rotates in the same rotational direction as the front bottom roller 112.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a fiber bundle concentrating device in a spinning machine. [Background technology]

[0002] The spinning machine includes a draft device and a fiber bundle concentrating device. The draft device includes a delivery roller pair composed of a top roller and a bottom roller. The fiber bundle drafted by the draft device is delivered from the delivery roller pair to the fiber bundle concentrating device.

[0003] The fiber bundle concentrating device includes a delivery roller pair including a delivery top roller and a delivery bottom roller. The fiber bundle delivered from the delivery roller pair of the draft device is pre-concentrated by the fiber bundle concentrating device before being twisted. The fiber bundle concentrated by the fiber bundle concentrating device is delivered in the delivery direction by the delivery roller pair and twisted.

[0004] As disclosed in Patent Document 1, for example, the fiber bundle concentrating device includes a rotating shaft having a delivery bottom roller, and a countershaft for rotating the rotating shaft. A drive gear is provided on the countershaft, and a passive gear is provided on the rotating shaft. The drive gear meshes with the passive gear. Then, when the countershaft rotates, the rotation of the countershaft is transmitted to the rotating shaft of the delivery bottom roller via the drive gear and the passive gear, so that the delivery bottom roller rotates and the delivery roller pair is driven. The rotation direction of the countershaft is opposite to the rotation direction of the bottom roller of the delivery roller pair and the delivery bottom roller. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] European Patent Application Publication No. 1473388 Summary of the Invention [Problem to be solved by the invention]

[0006] In a fiber bundle concentrating device equipped with a countershaft as in Patent Document 1, foreign matter such as a fiber bundle cut near a pair of delivery rollers may wrap around the bottom roller of the draft device and be sent toward the countershaft. At this time, since the countershaft rotates in the opposite direction to the bottom roller, the foreign matter is likely to be drawn in between the countershaft and the bottom roller. [Means for solving the problem]

[0007] To solve the above problems, a fiber bundle collecting device in a spinning machine includes a compact unit having a suction section that collects while sucking the fiber bundle sent out in the send-out direction by a send-out roller pair, and a delivery bottom roller for sending out the collected fiber bundle in the send-out direction, and a countershaft that is driven independently of the send-out bottom roller, which is one of the send-out roller pair, rotates to rotate the delivery bottom roller, and is disposed adjacent to the send-out bottom roller, and the countershaft rotates in the same rotational direction as the send-out bottom roller, and transmits the rotation of the countershaft to the delivery bottom roller via a power transmission device so that the delivery bottom roller rotates in the same rotational direction as the send-out bottom roller.

[0008] When foreign objects such as fly lint or cut fiber bundles get wrapped around the feed-out bottom roller, the foreign objects are sent toward the countershaft by the rotation of the feed-out bottom roller. According to the present invention, the rotation of the countershaft, which rotates in the same direction as the feed-out bottom roller, is transmitted to the delivery bottom roller via a power transmission device so that the delivery bottom roller rotates in the same direction as the feed-out bottom roller. Therefore, even if foreign objects are sent toward the countershaft by the rotation of the feed-out bottom roller, the foreign objects are swept out in the feed direction by the rotation of the countershaft. This makes it possible to prevent foreign objects from getting between the countershaft and the feed-out bottom roller.

[0009] Regarding a fiber bundle concentrating device in a spinning machine, the spinning machine may include a plurality of stands that rotatably support a rotating shaft that rotates integrally with the delivery bottom roller and are arranged in parallel in the axial direction of the rotating shaft, and a support plate that extends from the stand and rotatably supports the counter shaft, and the power transmission device may include a drive gear provided on a peripheral surface of the counter shaft, a passive gear provided on a peripheral surface of a delivery rotating shaft that rotates integrally with the delivery bottom roller, and an intermediate gear meshed with the drive gear and the passive gear, and the intermediate gear may be rotatably supported by a gear bracket extending from the support plate.

[0010] According to this, the drive gear is provided on the existing counter shaft, and the driven gear is provided on the existing delivery rotation shaft. Therefore, in the fiber bundle concentrating device, a power transmission device can be provided simply by adding a new intermediate gear and gear bracket. And since the intermediate gear is fixed to the support plate via the gear bracket, a new stand is not required to add the intermediate gear. Therefore, a power transmission device can be provided in the spinning machine without adding a large part such as a stand.

[0011] Regarding a fiber bundle concentrating device in a spinning machine, the spinning machine may include a plurality of stands rotatably supporting a rotating shaft that rotates integrally with the delivery bottom roller, the stands being arranged in parallel in the axial direction of the rotating shaft, and an intermediate stand that is arranged between adjacent stands in the axial direction, rotatably supporting the delivery rotating shaft that rotates integrally with the delivery bottom roller, and rotatably supporting the countershaft, and the power transmission device may include a drive gear provided on a circumferential surface of the countershaft, a passive gear provided on a circumferential surface of the delivery rotating shaft, and an intermediate gear meshed with the drive gear and the passive gear, and the intermediate gear may be rotatably supported by the intermediate stand.

[0012] According to this, the drive gear is provided on the existing countershaft, and the driven gear is provided on the existing delivery rotation shaft. Therefore, in the fiber bundle concentrating device, a power transmission device can be provided simply by adding a new intermediate gear. The intermediate gear is supported on an intermediate stand separate from the stand. As a method for supporting the intermediate gear, for example, the intermediate gear may be supported on a support plate extending from the stand. In this case, when it becomes necessary to remove the compact unit and the support plate due to a change in the spinning specifications of the yarn, the intermediate gear is also removed together with the support plate. However, since the intermediate gear is supported on the intermediate stand, the intermediate gear can be left installed in the spinning machine even when the compact unit and the support plate are removed from the spinning machine due to a change in the spinning specifications of the yarn.

[0013] The fiber bundle concentrating device in a spinning machine may be provided with a shaft guard that is arranged between adjacent stands in the axial direction and covers the countershaft, and the shaft guard may be flat and extend over the entire axial direction of the countershaft.

[0014] With this, even if the fiber bundle is cut and hangs down between the middle roller pair and the back roller pair of the drafting device of the spinning machine or from behind the back roller pair, the shaft guard can prevent the fiber bundle from wrapping around the countershaft. Also, the countershaft and the delivery bottom roller are connected via the power transmission device. Therefore, the countershaft can be covered with the flat shaft guard without any gaps over the entire axial direction of the countershaft at a position where there is no interference with the power transmission device. As a result, the shaft guard can more reliably prevent the fiber bundle from wrapping around the countershaft.

[0015] In a fiber bundle concentrating device in a spinning machine, the stand extends forward from a frame of the spinning machine, and the countershaft is disposed at a position closer to the frame than the intermediate gear.

[0016] According to this, the power transmission device can separate the counter shaft from the feed-out bottom roller, so that even if foreign matter is sent toward the counter shaft by the rotation of the feed-out bottom roller, the foreign matter can be prevented from entering between the feed-out bottom roller and the counter shaft. Effect of the Invention

[0017] According to the present invention, it is possible to prevent foreign matter from entering between the counter shaft and the feed-out bottom roller. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a front view showing a schematic diagram of a fiber bundle bundling device in a spinning machine. [Diagram 2] FIG. 2 is a front view showing a state in which the compact unit is removed. [Diagram 3] FIG. 3 is a cross-sectional view showing a draft device and a fiber bundle concentrating device. [Figure 4]FIG. 4 is a side view showing the stand and the support plate. [Diagram 5] FIG. 5 is a front view showing the delivery bottom roller. [Figure 6] FIG. 6 is a cross-sectional view showing a fiber bundle concentrating device. [Figure 7] FIG. 7 is a perspective view showing the shaft guard. [Figure 8] FIG. 8 is a plan view showing a schematic diagram of a fiber bundle collecting device according to another embodiment. [Figure 9] FIG. 9 is a cross-sectional view that illustrates a schematic diagram of a power transmission device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, one embodiment of a fiber bundle bundling device in a spinning machine will be described with reference to Figs. <Spinning machine> As shown in FIG. 1, the spinning machine 10 includes a draft device 11, a fiber bundle concentrating device 20, an out-end head 101, a gear end head 102, a plurality of stands 50, and a plurality of support plates 51.

[0020] The out-end head 101 and the gear end head 102 are provided on a frame 105 shown in Fig. 4. As shown in Figs. 1 and 2, the gear end head 102 has a front bottom roller driving unit 103 and a counter shaft driving unit 104 built in. The front bottom roller driving unit 103 and the counter shaft driving unit 104 are both motors. The front bottom roller driving unit 103 rotates a rotation shaft 112a of a front bottom roller 112 of the draft device 11 described later. The counter shaft driving unit 104 rotates a counter shaft 30 of the fiber bundle collecting device 20 described later.

[0021] The direction in which the out-end head 101 and the gear end head 102 face each other is defined as the longitudinal direction X of the spinning machine 10. The multiple stands 50 are disposed between the out-end head 101 and the gear end head 102 in the longitudinal direction X, and the multiple stands 50 are disposed at intervals in the longitudinal direction X.

[0022] As shown in Fig. 4, each stand 50 extending in the front-rear direction Z of the spinning machine 10 extends forward from the front surface 105a of the frame 105. The support plate 51 is fixed to the front of the stand 50. Two support plates 51 are fixed to each stand 50. Each support plate 51 extends forward from the stand 50. The two support plates 51 are fixed to the side of the stand 50 in the longitudinal direction X, sandwiching the stand 50 therebetween.

[0023] <Draft device> 3 and 4, the draft device 11 includes a back roller pair (not shown), a middle roller pair 114, a part of which is shown in Fig. 3, and a front roller pair 111 as a delivery roller pair. The front roller pair 111 is disposed downstream of the back roller pair and the middle roller pair 114 in the delivery direction Y of the fiber bundle F. The front roller pair 111 is disposed forward of the middle roller pair 114 in the front-rear direction Z.

[0024] The front roller pair 111 includes a front bottom roller 112 and a front top roller 113. The front bottom roller 112 is a feed-out bottom roller that is one of the feed-out roller pairs. The front top roller 113 is a pair of rubber rollers, and the front bottom roller 112 is a metal roller. The front bottom roller 112 is formed by expanding the diameter of a rotating shaft 112a at multiple points in the axial direction. Therefore, the front bottom roller 112 rotates together with the rotating shaft 112a. The rotating shaft 112a, and therefore the front bottom roller 112, are rotated by the front bottom roller drive unit 103. Therefore, the front bottom roller drive unit 103 is a drive unit that rotates the front bottom roller 112 that is one of the front roller pair 111. The rotating shaft 112a of the front bottom roller 112 is rotatably supported by a plurality of stands 50. That is, the stands 50 rotatably support the rotating shaft 112a that rotates together with the front bottom roller 112. Therefore, the spinning machine 10 includes a plurality of stands 50 arranged side by side in the axial direction of the rotating shaft 112a, that is, in the longitudinal direction X. The front top roller 113 is rotatably supported by a support arm (not shown).

[0025] The front roller pair 111 is a delivery roller pair located most downstream in the delivery direction Y among the front roller pair 111, the middle roller pair 114, and the back roller pair included in the draft device 11. The draft device 11 drafts the fiber bundle F by utilizing the peripheral speed difference between the front roller pair 111, the middle roller pair 114, and the back roller pair. The fiber bundle F drafted by the draft device 11 is delivered from the front roller pair 111 toward the fiber bundle collecting device 20.

[0026] <Fiber bundle concentrating device> 1 and 3, the fiber bundle collecting device 20 is disposed between an out-end head 101 and a gear end head 102 in the longitudinal direction X. The fiber bundle collecting device 20 includes a plurality of compact units 21, a plurality of counter shafts 30, and a power transmission device 40 provided for each compact unit 21. The fiber bundle collecting device 20 also includes a shaft guard 60 that covers each counter shaft 30.

[0027] <Compact unit> The compact unit 21 collects the fiber bundle F drafted by the draft device 11. That is, the compact unit 21 collects the fiber bundle F delivered by the front roller pair 111 while sucking it.

[0028] As shown in Figures 1 to 3, one compact unit 21 includes a plurality of delivery bottom rollers 23, one suction section 24, the same number of ventilation aprons 25 as the number of delivery bottom rollers 23, the same number of guide sections 29 as the number of delivery bottom rollers 23, a plurality of delivery top rollers 26 as the number of delivery bottom rollers 23, and a support section 21a.

[0029] The delivery bottom rollers 23 are provided on the circumferential surface of a delivery rotation shaft 23a that rotates integrally with the delivery bottom rollers 23. The delivery bottom rollers 23 are arranged at intervals in the axial direction of the delivery rotation shaft 23a.

[0030] As shown in FIG. 5, the diameter of the delivery bottom roller 23 is larger than the diameter of the delivery rotation shaft 23a. The delivery rotation shaft 23a has a first shaft portion 231 on the first end side in the axial direction and a second shaft portion 232 on the second end side in the axial direction. The first shaft portion 231 is a portion ahead of the delivery bottom roller 23 closest to the first end in the axial direction, and the second shaft portion 232 is a portion ahead of the delivery bottom roller 23 closest to the second end in the axial direction. The length of the first shaft portion 231 in the axial direction of the delivery rotation shaft 23a is longer than the length of the second shaft portion 232 in the axial direction of the delivery rotation shaft 23a. The delivery rotation shaft 23a has a passive gear 23b on the circumferential surface of the first shaft portion 231. The gear diameter of the passive gear 23b is approximately the same as the diameter of the delivery bottom roller 23. The passive gear 23b rotates integrally with the delivery rotation shaft 23a and thus the delivery bottom roller 23. Then, the delivery bottom roller 23 delivers the gathered fiber bundle F in a delivery direction Y.

[0031] 1 and 3, the suction section 24 has a pipe shape that is long in the longitudinal direction X. The suction section 24 has a plurality of suction holes 24a. The plurality of suction holes 24a are arranged at intervals in the longitudinal direction X. The suction section 24 collects the fiber bundle F that is fed in the feeding direction Y by the front roller pair 111 while sucking it.

[0032] Each ventilation apron 25 is formed of an endless woven fabric that ensures breathability. Each ventilation apron 25 is wrapped around the delivery bottom roller 23, a portion of the suction section 24 where the suction holes 24a are formed, and the guide section 29. The suction section 24 exerts a suction effect on the transported fiber bundle F via the ventilation apron 25. The ventilation apron 25 is rotated along the suction section 24, the delivery bottom roller 23, and the guide section 29.

[0033] The delivery top rollers 26 are a pair of rollers made of rubber. Each delivery bottom roller 23 is disposed in a position facing the delivery top roller 26. The ventilation apron 25 is sandwiched between the delivery top roller 26 and the delivery bottom roller 23.

[0034] The support parts 21a are located at both axial ends of the delivery rotation shaft 23a. The support parts 21a rotatably support the delivery rotation shaft 23a and also support the suction part 24. The compact unit 21 is attached to the spinning machine 10 by having the support parts 21a supported by the support plates 51 adjacent to each other in the longitudinal direction X.

[0035] <Countershaft> 2, the multiple countershafts 30 are aligned in the longitudinal direction X so as to be positioned on the same straight line. Each countershaft 30 is rotatably supported by a support plate 51. The countershafts 30 adjacent to each other in the longitudinal direction X are connected by a coupling 32 with their axial ends facing each other.

[0036] Each countershaft 30 has a drive gear 31 at one end in the axial direction. The drive gear 31 rotates integrally with the countershaft 30. The countershaft 30 rotates to rotate the delivery bottom roller 23 of each compact unit 21.

[0037] As shown in FIG. 3, the counter shaft 30 is disposed adjacent to the front bottom roller 112 obliquely below and rearward of the front bottom roller 112 . 2, of the multiple countershafts 30, the countershaft 30 closest to the gear end head 102 is connected to a countershaft drive unit 104. When the countershaft 30 closest to the gear end head 102 is rotated by the countershaft drive unit 104, the other countershafts 30 connected by the couplings 32 also rotate. Therefore, the countershaft 30 is driven independently of the front bottom roller 112, which is one of the front roller pair 111.

[0038] <Power transmission device> 2 and 6, the power transmission device 40 includes a driven gear 23b provided on the circumferential surface of the delivery rotation shaft 23a, a driving gear 31 provided on the circumferential surface of the counter shaft 30, and an intermediate gear 41 meshed with the driven gear 23b and the driving gear 31. The counter shaft 30 and the delivery bottom roller 23 are connected via the power transmission device 40.

[0039] The intermediate gear 41 is fixed to the support plate 51 via a gear bracket 42. The gear bracket 42 is fixed to a support plate 51 that is closer to the drive gear 31 among the support plates 51 of one unit. The gear bracket 42 includes a plate-shaped bracket main body 43 fixed to the support plate 51 and a support shaft 44 extending from the bracket main body 43. The support shaft 44 extends from the bracket main body 43 along the longitudinal direction X, and is bent toward the counter shaft 30, and then bent so as to extend parallel to the counter shaft 30. The intermediate gear 41 is rotatably supported at the tip of the support shaft 44. Thus, the intermediate gear 41 is rotatably supported by the gear bracket 42 extending from the support plate 51.

[0040] The intermediate gear 41 is interposed between the delivery rotation shaft 23a and the countershaft 30 in the front-rear direction Z of the spinning machine 10. Therefore, the countershaft 30 is disposed rearward of the intermediate gear 41. In other words, the countershaft 30 is disposed closer to the frame 105 than the intermediate gear 41.

[0041] 1 and 2, the dimension of the intermediate gear 41 in the longitudinal direction X is smaller than the dimensions of the driven gear 23b and the drive gear 31 in the longitudinal direction X. The intermediate gear 41 is disposed within the dimension of the driven gear 23b in the longitudinal direction X and within the dimension of the drive gear 31 in the longitudinal direction X.

[0042] All the countershafts 30 are rotated synchronously by the countershaft driving unit 104. When the countershafts 30 rotate, the driving gear 31 rotates together with the countershafts 30 in a rotation direction R1 as shown in FIG. 6. The rotation direction R1 is the same as the rotation direction R4 of the front bottom roller 112. The rotation of the driving gear 31 is transmitted to the intermediate gear 41, and the intermediate gear 41 rotates in a rotation direction R2. The intermediate gear 41 rotates in the opposite direction to the rotation direction R1 of the driving gear 31. The rotation of the intermediate gear 41 is transmitted to the driven gear 23b. Then, the driven gear 23b rotates in a rotation direction R3 opposite to the rotation direction R2 of the intermediate gear 41. As a result, the delivery rotation shaft 23a integral with the driven gear 23b, and thus the delivery bottom roller 23 also rotate in the rotation direction R3. Therefore, the power transmission device 40 transmits the rotation of the countershaft 30 to the delivery bottom roller 23, and aligns the rotation direction R3 of the delivery bottom roller 23 with the rotation direction R4 of the front bottom roller 112. In other words, by using the power transmission device 40, the rotation direction R1 of the countershaft 30 and the rotation direction R3 of the delivery bottom roller 23 can be made the same.

[0043] In the fiber bundle collecting device 20, the power transmission device 40 is driven by a countershaft driving unit 104. On the other hand, the front bottom roller 112 is driven by a front bottom roller driving unit 103. That is, the power transmission device 40 and the front bottom roller 112 are driven independently of each other.

[0044] <Shaft guard> 3, 4 and 7, the shaft guard 60 is mounted on a pair of support plates 51 that sandwich one compact unit 21. The shaft guard 60 is in the form of a long plate in the longitudinal direction X. The shaft guard 60 includes a first guard portion 61 that covers the counter shaft 30 from above, and a second guard portion 62 that covers the counter shaft 30 from the frame 105 side. Each of the first guard portion 61 and the second guard portion 62 is in the form of a long flat plate extending in the longitudinal direction X.

[0045] The shaft guard 60 includes a pair of mounting pieces 63 for mounting the shaft guard 60 to the support plate 51. The mounting pieces 63 are provided at both longitudinal ends of the shaft guard 60. One of the pair of mounting pieces 63 is mounted to one of the pair of support plates 51, and the other of the pair of mounting pieces 63 is mounted to the other of the pair of support plates 51. Therefore, the shaft guard 60 is disposed between the stands 50 adjacent to each other in the axial direction of the rotating shaft 112a. The first guard portion 61 and the second guard portion 62 can be said to be flat plates extending over the entire axial direction of the countershaft 30.

[0046] In addition, the shaft guard 60 covers the countershaft 30 while being spaced apart from the countershaft 30. As described above, the countershaft 30 and the delivery bottom roller 23 are connected via the power transmission device 40. The countershaft 30 is disposed rearward of the intermediate gear 41 of the power transmission device 40. In other words, the intermediate gear 41 of the power transmission device 40 is disposed forward of the countershaft 30. The drive gear 31 of the power transmission device 40 is integrally provided on the countershaft 30, and the shaft guard 60 is spaced apart from the countershaft 30. Therefore, the shaft guard 60 is disposed at a position where it does not interfere with the intermediate gear 41 and the drive gear 31 of the power transmission device 40.

[0047] <Operation of the embodiment> In the spinning machine 10, when the draft device 11 is driven, the fiber bundle F is drafted by utilizing the peripheral speed difference between a back roller pair (not shown), a middle roller pair 114, and a front roller pair 111.

[0048] As shown in FIGS. 3 and 6, the fiber bundle F drafted by the draft device 11 is delivered from a front roller pair 111 toward the fiber bundle collecting device 20. The fiber bundle F delivered from the front roller pair 111 is supplied to the fiber bundle collecting device 20. The fiber bundle F is sandwiched between the delivery bottom roller 23 and the delivery top roller 26, and delivered in the delivery direction Y while being sucked into the suction section 24 via the ventilation apron 25. As a result, the fiber bundle F is collected.

[0049] The front bottom roller 112 and the delivery bottom roller 23 deliver the fiber bundle F in the delivery direction Y. Therefore, the rotation direction R3 of the delivery bottom roller 23 is the same as the rotation direction R4 of the front bottom roller 112. By providing a power transmission device 40 including an intermediate gear 41 between the counter shaft 30 and the delivery bottom roller 23, the rotation direction R1 of the counter shaft 30 can be made the same as the rotation direction R4 of the front bottom roller 112.

[0050] <Effects of the embodiment> According to the above embodiment, the following effects can be obtained. (1) The rotation of the countershaft 30, which rotates in the same rotation direction R1 as the rotation direction R4 of the front bottom roller 112, is transmitted to the delivery bottom roller 23 via the power transmission device 40 so that the delivery bottom roller 23 rotates in the same rotation direction as the front bottom roller 112. Therefore, even if foreign matter such as fluff is sent toward the countershaft 30 by the rotation of the front bottom roller 112, the foreign matter is swept out from between the front bottom roller 112 and the countershaft 30 in the delivery direction Y by the rotation of the countershaft 30. Therefore, it is possible to prevent foreign matter from entering between the front bottom roller 112 and the countershaft 30.

[0051] (2) The dimension of the intermediate gear 41 in the longitudinal direction X is smaller than the dimensions of the driven gear 23b and the driving gear 31 in the longitudinal direction X. Furthermore, the driving gear 31 is provided only on a part of the axial length of the countershaft 30. For this reason, even if the rotational direction R1 of the driving gear 31 and the rotational direction R2 of the intermediate gear 41 are opposite to each other, foreign matter is unlikely to get between the driving gear 31 and the intermediate gear 41.

[0052] (3) The power transmission device 40 is formed by the drive gear 31, the driven gear 23b, and the intermediate gear 41. The power transmission device 40 is provided at a part of the axial direction of the countershaft 30 and the delivery rotation shaft 23a. Therefore, at the part where the intermediate gear 41 is provided, the countershaft 30 and the delivery rotation shaft 23a mesh with each other via the intermediate gear 41, but at other parts, the countershaft 30 and the delivery rotation shaft 23a are separated from each other. Therefore, the arrangement is such that foreign matter is likely to get between the countershaft 30 and the delivery rotation shaft 23a, but the foreign matter is swept out from between the front bottom roller 112 and the countershaft 30 by the rotation of the countershaft 30. Therefore, it is possible to prevent foreign matter from getting between the front bottom roller 112 and the countershaft 30.

[0053] (4) The drive gear 31 is provided on the existing counter shaft 30, and the driven gear 23b is provided on the existing delivery rotation shaft 23a. Therefore, in the fiber bundle collecting device 20, the power transmission device 40 can be provided simply by adding a new intermediate gear 41. In addition, since the intermediate gear 41 is fixed to the support plate 51 via the gear bracket 42, a new stand 50 is not required to add the intermediate gear 41. Therefore, the power transmission device 40 can be provided in the spinning machine 10 without adding a large part such as the stand 50.

[0054] (5) The fiber bundle F may break and hang down between the middle roller pair 114 and the back roller pair of the draft device 11 or from behind the back roller pair (shown by the phantom lines in FIG. 3). There is a risk that the hanging fiber bundle F may wind around the counter shaft 30, but by providing the shaft guard 60, the fiber bundle F is prevented from winding around the counter shaft 30.

[0055] (6) The counter shaft 30 and the delivery bottom roller 23 are connected via the power transmission device 40. The flat shaft guard 60 can seamlessly cover the counter shaft 30 over the entire axial direction of the counter shaft 30 at a position where there is no interference with the power transmission device 40. As a result, the shaft guard 60 can more reliably prevent the fiber bundle F from wrapping around the counter shaft 30.

[0056] (7) The countershaft 30 is disposed closer to the frame 105 than the intermediate gear 41. In other words, the intermediate gear 41 can move the countershaft 30 away from the front bottom roller 112. Therefore, even if foreign matter is sent toward the countershaft 30 by the rotation of the front bottom roller 112, the foreign matter can be further prevented from entering between the front bottom roller 112 and the countershaft 30.

[0057] <Another example> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0058] As shown in Figure 8, the spinning machine 10 includes an intermediate stand 53 disposed between the stands 50 adjacent to each other in the longitudinal direction X. The intermediate stand 53 extends forward from a frame 105 (not shown in Figure 8).

[0059] In this case, the countershafts 30 adjacent to each other in the longitudinal direction X are connected to each other by a coupling 32 with a gear shaft 34 sandwiched therebetween. The gear shaft 34 includes a shaft portion 34a and a gear portion 34b that rotates integrally with the shaft portion 34a. The countershafts 30 adjacent to each other in the longitudinal direction X and the gear shaft 34 are connected to each other by the coupling 32. A portion of the shaft portion 34a of the gear shaft 34 that is located between the pair of gear portions 34b is supported by the intermediate stand 53 via a bearing 35.

[0060] Furthermore, one compact unit 21 is supported between the stand 50 and the intermediate stand 53 adjacent to each other in the longitudinal direction X. At this time, two compact units 21 are supported between a pair of stands 50 adjacent to each other in the longitudinal direction X by using the intermediate stand 53. In the two compact units 21, each passive gear 23b is disposed closer to the intermediate stand 53 than to the stand 50.

[0061] A support shaft 56 integral with an intermediate gear 55 is rotatably supported on the intermediate stand 53. The intermediate gear 55 is provided on both ends of the support shaft 56. The intermediate gear 55 meshes with the gear portion 34b and the driven gear 23b. Thus, the spinning machine 10 includes two power transmission devices 40, each formed by the driven gear 23b that rotates integrally with the delivery bottom roller 23, the gear portion 34b that rotates integrally with the countershaft 30, and the intermediate gear 55, on either side of the intermediate stand 53.

[0062] According to this, the gear portion 34b is provided on the existing counter shaft 30, and the driven gear 23b is provided on the existing delivery rotation shaft 23a. Therefore, in the fiber bundle collecting device 20, the power transmission device 40 can be provided simply by adding a new intermediate gear 55. The intermediate gear 55 is supported by the intermediate stand 53 via a support shaft 56. The intermediate stand 53 is directly fixed to the frame 105 separately from the stand 50. Therefore, even if the compact unit 21 and the support plate 51 are removed from the spinning machine 10 due to a change in spinning specifications from compact yarn to ordinary yarn, the intermediate stand 53 and the intermediate gear 55 can remain installed in the spinning machine 10.

[0063] 9, the power transmission device may be a drive belt 70 that transmits the rotation of the countershaft 30 to the delivery bottom roller 23 so that the delivery bottom roller 23 rotates in the same direction as the front bottom roller 112. In this case, the intermediate gear 41, the driven gear 23b, and the drive gear 31 are not necessary.

[0064] The power transmission device may be a friction wheel that transmits the rotation of the countershaft 30 to the delivery bottom roller 23 so that the delivery bottom roller 23 rotates in the same rotation direction as the front bottom roller 112. The friction wheel is in sliding contact with the delivery rotation shaft 23a and the countershaft 30. In short, as long as the rotation of the countershaft 30 can be transmitted to the delivery bottom roller 23 so that the delivery bottom roller 23 rotates in the same rotation direction as the front bottom roller 112, the configuration of the power transmission device is arbitrary.

[0065] In the fiber bundle collecting device 20 of the spinning machine 10, the shaft guard 60 may be omitted. The shaft guard 60 may be configured only by the first guard portion 61 and the mounting piece 63. The shaft guard 60 may include a guard portion for covering the counter shaft 30 in addition to the first guard portion 61 and the second guard portion 62. In short, the shape of the shaft guard 60 can be changed as appropriate as long as it can cover the counter shaft 30.

[0066] The draft device 11 may include two roller pairs. In this case, of the two roller pairs, the roller pair located most downstream in the sending direction Y serves as the sending roller pair. In the fiber bundle collecting device 20 of the spinning machine 10, the number of compact units 21 and the number of counter shafts 30 may be changed as appropriate. [Explanation of symbols]

[0067] F...fiber bundle, R1 to R4...rotation direction, Y...delivery direction, 10...spinning machine, 20...fiber bundle concentrating device, 21...compact unit, 23...delivery bottom roller, 23a...delivery rotating shaft, 23b...passive gear, 24...suction section, 30...countershaft, 31...driving gear, 40...power transmission device, 41, 55...intermediate gear, 42...gear bracket, 50...stand, 51...support plate, 53...intermediate stand, 60...shaft guard, 105...frame, 111...front roller pair as delivery roller pair, 112...front bottom roller as delivery bottom roller, 112a...rotation shaft.

Claims

1. A compact unit including a suction section that suctions and converges the fiber bundle delivered in the delivery direction by a delivery roller pair, and a delivery bottom roller that delivers the converged fiber bundle in the delivery direction; A fiber bundle concentrating device for a spinning machine, comprising: a counter shaft that is driven independently from a delivery bottom roller that is one of the delivery roller pair, rotates to rotate the delivery bottom roller, and is disposed adjacent to the delivery bottom roller, a power transmission device for transmitting the rotation of the countershaft to the delivery bottom roller via the power transmission device so that the delivery bottom roller rotates in the same rotation direction as the let-off bottom roller.

2. The spinning machine includes: a plurality of stands that rotatably support a rotation shaft that rotates integrally with the feed bottom roller and are arranged in parallel in the axial direction of the rotation shaft; a support plate extending from the stand and rotatably supporting the countershaft, The power transmission device includes a drive gear provided on a circumferential surface of the countershaft; A passive gear is provided on the peripheral surface of a delivery rotation shaft that rotates integrally with the delivery bottom roller; an intermediate gear meshed with the drive gear and the passive gear, 2. The fiber bundle concentrating device for a spinning machine according to claim 1, wherein the intermediate gear is rotatably supported by a gear bracket extending from the support plate.

3. The spinning machine includes: a plurality of stands rotatably supporting a rotation shaft that rotates integrally with the feed bottom roller, the stands being arranged in parallel in an axial direction of the rotation shaft; An intermediate stand is provided between the stands adjacent to each other in the axial direction, and rotatably supports a delivery rotation shaft that rotates integrally with the delivery bottom roller and rotatably supports the counter shaft; The power transmission device includes a drive gear provided on a circumferential surface of the countershaft; A passive gear provided on the peripheral surface of the delivery rotation shaft; an intermediate gear meshed with the drive gear and the passive gear, 2. The fiber bundle concentrating device for a spinning machine according to claim 1, wherein the intermediate gear is rotatably supported by the intermediate stand.

4. a shaft guard disposed between the stands adjacent to each other in the axial direction and covering the counter shaft; 4. The fiber bundle focusing device for a spinning machine according to claim 2, wherein the shaft guard is in the form of a flat plate extending over the entire axial direction of the counter shaft.

5. 4. The fiber bundle concentrating device for a spinning machine according to claim 2, wherein the stand extends forward from a frame of the spinning machine, and the countershaft is disposed at a position closer to the frame than the intermediate gear.

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