Member for cleaning device of drawing roller and cleaning device

Abstract

The utility model provides a component for a cleaning device of a drawing roller and the cleaning device comprising the component for the cleaning device of the drawing roller. The cleaning device member has an opposing surface disposed to face the drawing roller, and two contact portions protruding from the opposing surface and spaced apart from each other in a width direction corresponding to a longitudinal direction. Each of the contact portions has a first portion and a second portion, the width of the first portion in the width direction is greater than the height in the height direction corresponding to the short side direction, and the second portion is connected to the first portion at least on one side in the height direction. The width of a connection portion between the second portion and the first portion in the width direction is 30% or more and 50% or less of the width of the first portion in the width direction.

Description

Technical Field

[0001] The utility model relates to a cleaning device component for a drafting roller and a cleaning device. Background Art

[0002] In the drafting device of a spinning machine, a cleaning device installed on the drafting roller is known. As described in Patent Documents 1 and 2, the cleaning device has a magnet housing, a magnet accommodated in the magnet housing, and a resin scraper (or contact member) installed on the magnet housing. The cleaning device is detachably mounted on the drafting roller by the magnetic force of the magnet. The scraper is pressed against the outer peripheral surface of the drafting roller. The scraper removes fibers attached to the outer peripheral surface of the drafting roller. (Patent Document 1: Japanese Patent Publication No. 2015-101797, Patent Document 2: Japanese Patent Publication No. 2017-226940)

[0003] In the cleaning device described in Patent Document 1, the contact member has a surface facing the drafting roller, and two parallel elongated protrusions extending in the axial direction are provided on the surface. In the cleaning device described in Patent Document 2, the scraper has a surface facing the drafting roller, and four elongated protrusions extending in the rotation direction of the drafting roller are provided on the surface.

[0004] The lower roller of the drafting roller is formed of metal such as iron. As the drafting device operates for a long time, the wear of the surface of the lower roller may increase. In the cleaning devices of Patent Documents 1 and 2, since the convex portion is slender, the force applied by the cleaning device to the surface of the drafting roller is sometimes local. Utility Model Content

[0005] The utility model aims to provide a member for a cleaning device of a drafting roller and a cleaning device which can disperse the force applied to the surface of the drafting roller and reduce the local contact.

[0006] A cleaning device component for a drafting roller according to one embodiment of the present invention extends in the long side direction and the short side direction. The cleaning device component comprises: an opposing surface, which is arranged opposite to the drafting roller; and two contact portions, which protrude from the opposing surface and are separated and arranged in the width direction corresponding to the long side direction. Each contact portion comprises: a first portion, whose width in the width direction is greater than its height in the height direction corresponding to the short side direction; and a second portion, which is connected to the first portion at least on one side in the height direction, and the width in the width direction of the connection portion between the second portion and the first portion is greater than 30% and less than 50% of the width in the width direction of the first portion.

[0007] According to the cleaning device component, a second part connected to the first part is provided in each of the two contact parts separated in the width direction. The width of the connection part between the second part and the first part is 30% or more and 50% or less of the width of the first part. The width of the connection part is wider than that of the existing cleaning device component. Therefore, the force applied to the surface of the drafting roller is dispersed over a wider range of the first part and the second part as a whole. As a result, the local contact with the surface of the drafting roller can be reduced.

[0008] In the width direction, the spacing distance between the two second portions can be more than 2 times and less than 2.5 times of the spacing distance between the two first portions. In this case, since the two second portions are arranged with sufficient intervals, it is reliably ensured that the yarn strip passes the required interval.

[0009] In each of the contact portions, the second portion may be arranged at a position outside the center of the first portion in the width direction. In this case, the two second portions can be further separated and arranged, and it is easy to ensure the interval required for the yarn strip to pass through.

[0010] The first surface of the first portion and the second surface of the second portion may be arcs having the same radius of curvature and the same center in a cross section orthogonal to the width direction. In this case, the second surface of the second portion stably contacts the surface of the drafting roller together with the first surface of the first portion. Therefore, the force is more appropriately dispersed.

[0011] In each of the contact portions, the second portion may be connected to both sides of the first portion in the height direction, and each of the contact portions may be substantially cross-shaped. In this case, the contact area with the drafting roller can be increased, and the force dispersion effect can also be improved.

[0012] The facing surface and the contact portion may be formed integrally. In this case, even if the contact portion is subjected to the friction force from the drafting roller, the position of the contact portion relative to the facing surface will not be offset.

[0013] Another embodiment of the present invention relates to a cleaning device comprising: a cleaning device component for the drafting roller as described in any one of the above items; a cover component installed on the side of the cleaning device component opposite to the opposing surface; and one or two magnets arranged between the cleaning device component and the cover component.

[0014] According to the cleaning device, the contact portion of the cleaning device member is pressed against the outer peripheral surface of the drafting roller by the magnetic force of the magnet. The force applied to the surface of the drafting roller is dispersed over a wide range of the first and second parts, thereby reducing local contact with the surface of the drafting roller.

[0015] In the cleaning device, the two magnets may be arranged separately in the width direction. In this case, corresponding to the two contact portions, appropriate pressing forces can be applied at appropriate positions or regions by the two magnets.

[0016] In the cleaning device, one magnet may be arranged at the center in the width direction. In this case, the cleaning device can apply a pressing force via two contact parts using one magnet, and the structure can be simplified.

[0017] According to the present invention, the force applied to the surface of the drafting roller is dispersed over a wide range of the entire first portion and the second portion, so that local contact with the surface of the drafting roller can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the spinning machine according to the embodiment.

[0019] Figure 2 It is a top view of the drafting device to which the cleaning device according to one embodiment of the present invention is applied.

[0020] Figure 3 It is a side view of the drafting device to which the cleaning device which concerns on one Embodiment of this invention is applied.

[0021] Figure 4 It is an exploded perspective view of the cleaning device.

[0022] Figure 5 is Figure 4 A cross-sectional view of a first portion and a second portion cut along a plane perpendicular to the width direction in a cleaning device.

[0023] Figure 6 yes Figure 4 A front view of a component for a cleaning device in FIG.

[0024] Figure 7 Yes means Figure 6 A front view of the outer shape of a contact portion in a cleaning device component.

[0025] Figure 8 It is a front view showing the outer shape of a contact portion in a cleaning device member according to a modified example.

[0026] Fig. 9 It is a front view showing the outer shape of a contact portion in a cleaning device member according to another modified example. DETAILED DESCRIPTION

[0027] Hereinafter, the embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, in each figure, the same or corresponding parts are marked with the same reference numerals, and repeated description is omitted.

[0028] like Figure 1 As shown, the spinning machine 1 has a plurality of spinning units 2, a yarn joining trolley 3, a yarn doffing trolley (not shown), a first end frame 4 and a second end frame 5. The plurality of spinning units 2 are arranged in a row. Each spinning unit 2 generates a yarn Y and winds it into a package P. When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining trolley 3 performs a yarn joining operation on the spinning unit 2. When the package P in a certain spinning unit 2 becomes full, the yarn doffing trolley does away the package P and supplies a new bobbin B to the spinning unit 2.

[0029] The first end frame 4 contains a recovery device, etc., which recovers fiber scraps and yarn scraps generated in the spinning unit 2. The second end frame 5 contains an air supply unit, which adjusts the air pressure of compressed air (air) supplied to each part of the spinning machine 1 and supplies air to each part, and a drive motor, etc., which supplies power to each part of the spinning unit 2. The second end frame 5 is provided with a machine control device 51, a display screen 52, and input keys 53. Instead of the display screen 52 and the input keys 53, a touch panel screen may be provided.

[0030] The machine control device 51 centrally manages and controls each part of the spinning machine 1. The display screen 52 can display information related to at least one of the setting content and status of the spinning unit 2. The operator can perform the setting operation of the spinning unit 2 by using the input key 53 or the button displayed on the touch panel screen to perform appropriate operations.

[0031] Each spinning unit 2 has a drafting device 6, an air spinning device 7, a yarn monitoring device 8, a tension sensor 9, a yarn storage device 11, a waxing device 12, and a winding device 13, starting from the upstream side in the traveling direction of the yarn Y. The unit controller 10 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2.

[0032] The drafting device 6 drafts the sliver (fiber bundle) S to generate a fiber bundle F. The air spinning device 7 twists the fiber bundle F generated by the drafting device 6 using a swirling air flow to generate a yarn Y. In more detail (however, the figure is omitted), the air spinning device 7 has a spinning chamber, a fiber guide portion, a swirling air flow generating nozzle, and a hollow guide shaft. The fiber guide portion guides the fiber bundle F supplied from the drafting device 6 on the upstream side into the spinning chamber. The swirling air flow generating nozzle is arranged around the path along which the fiber bundle F travels. By ejecting air from the swirling air flow generating nozzle, a swirling air flow is generated in the spinning chamber. By the swirling air flow, each fiber end of the plurality of fibers constituting the fiber bundle F is reversed and rotated. The hollow guide shaft guides the yarn Y from the spinning chamber to the outside of the air spinning device 7.

[0033] The yarn monitoring device 8 monitors information of the running yarn Y between the air spinning device 7 and the yarn accumulation device 11, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, it sends a yarn defect detection signal to the unit controller 10. The yarn monitoring device 8 also detects, for example, at least one of an abnormality in the thickness of the yarn Y and a foreign object contained in the yarn Y as a yarn defect. The yarn monitoring device 8 also detects yarn breakage, etc. The tension sensor 9 measures the tension of the running yarn Y between the air spinning device 7 and the yarn accumulation device 11, and sends a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of at least one of the yarn monitoring device 8 and the tension sensor 9, the yarn Y is cut in the spinning unit 2. Specifically, the yarn Y is cut by stopping the supply of air to the air spinning device 7 to interrupt the generation of the yarn Y. Alternatively, the yarn Y may be cut by a separately provided cutter.

[0034] The waxing device 12 waxes the yarn Y between the yarn pooling device 11 and the winding device 13 .

[0035] The yarn accumulation device 11 accumulates the yarn Y between the air spinning device 7 and the winding device 13. The yarn accumulation device 11 has a yarn accumulation roller that accumulates the yarn Y by winding the yarn Y around the outer peripheral surface. The yarn accumulation device 11 has a function of stably drawing the yarn Y from the air spinning device 7, a function of retaining the yarn Y sent out from the air spinning device 7 when the yarn splicing carriage 3 performs a yarn splicing operation to prevent the yarn Y from being loosened, and a function of preventing changes in the tension of the yarn Y on the downstream side of the yarn accumulation device 11 from being transmitted to the air spinning device 7.

[0036] The winding device 13 winds the yarn Y around the bobbin B to form a package P.

[0037] When the yarn Y is cut in a certain spinning unit 2 or when the yarn Y is cut for some reason, the yarn joining cart 3 moves to the spinning unit 2 to perform the yarn joining operation.

[0038] The above-mentioned drafting device 6 is described in more detail. Figure 2 and Figure 3 As shown, the drafting device 6 includes a rear roller pair 14, a third roller pair 15, a middle roller pair 16, and a front roller pair 17 in this order from the upstream side in the traveling direction of the sliver S.

[0039] The rear roller pair 14 is a drafting roller for drafting the yarn S, and includes a rear lower roller (lower roller) 14a and a rear upper roller 14b that are opposed to each other with a travel path R sandwiched therebetween for the yarn S. The third roller pair 15 is a drafting roller for drafting the yarn S, and includes a third lower roller (lower roller) 15a and a third upper roller 15b that are opposed to each other with a travel path R sandwiched therebetween.

[0040] The middle roller pair 16 is a drafting roller for drafting the yarn S, and includes a middle bottom roller 16a and a middle top roller 16b that are opposite to each other with a travel path R interposed therebetween. An apron belt 18a is provided on the middle bottom roller 16a. An apron belt 18b is provided on the middle top roller 16b. The front roller pair 17 is a drafting roller for drafting the yarn S, and includes a front bottom roller 17a and a front top roller 17b that are opposite to each other with a travel path R interposed therebetween. The rear bottom roller 14a, the third bottom roller 15a, the middle bottom roller 16a, and the front bottom roller 17a are rotationally driven by a drive motor provided on the second end frame 5 or a drive motor provided on each spinning unit 2.

[0041] The plurality of roller pairs 14, 15, 16 and 17 draft the sliver S supplied from a can (not shown) and cause it to travel from the upstream side to the downstream side. Hereinafter, the direction along the travel path R is referred to as the "drafting direction". The upstream side in the drafting direction is referred to as the "upstream side", and the downstream side in the drafting direction is referred to as the "downstream side".

[0042] The rear bottom roller 14a is rotatably supported by the rear roller housing 61. The third bottom roller 15a is rotatably supported by the third roller housing 62. The middle bottom roller 16a is rotatably supported by the middle roller housing 63. The front bottom roller 17a is rotatably supported by the front roller housing 64. Each roller housing 61, 62, 63 and 64 is mounted on the machine frame 20. Each bottom roller 14a, 15a, 16a and 17a rotates at different rotation speeds from each other so that the roller located on the downstream side rotates faster.

[0043] Each of the top rollers 14b, 15b, 16b, and 17b is rotatably supported by the drafting cradle 65. Each of the top rollers 14b, 15b, 16b, and 17b contacts each of the bottom rollers 14a, 15a, 16a, and 17a with a predetermined pressure and rotates therefrom. Each of the bottom rollers 14a, 15a, 16a, and 17a is made of, for example, iron or other metal. Each of the top rollers 14b, 15b, 16b, and 17b is made of, for example, rubber.

[0044] The drafting cradle 65 is rotatably provided around a support shaft 67 at a position where each of the top rollers 14b, 15b, 16b and 17b contacts each of the bottom rollers 14a, 15a, 16a and 17a with a predetermined pressure and at a position where each of the top rollers 14b, 15b, 16b and 17b is separated from each of the bottom rollers 14a, 15a, 16a and 17a. The drafting cradle 65 rotatably supports each of the top rollers 14b, 15b, 16b and 17b of the drafting devices 6 respectively provided in a pair of adjacent spinning units 2.

[0045] A guide member 71 is arranged at a position upstream of the rear roller pair 14 (at Figure 1 The guide member 71 is provided with a through hole 71a through which the yarn S passes. The guide member 71 guides the yarn S supplied from a can (not shown) to the travel path R.

[0046] A restriction member 72 is disposed between the third roller pair 15 and the middle roller pair 16 (at Figure 1 The limiting member 72 is provided with a through hole 72a through which the yarn S passes. The limiting member 72 limits the width of the yarn S to the width of the through hole 72a.

[0047] A cleaning device 100 is provided on the rear bottom roller 14a (at Figure 1 The cleaning device 100 removes the outer peripheral surface 14c (see FIG. 1 ) of the rear bottom roller 14a by using a scraper (cleaning device member) 200. Figure 5 The third bottom roller 15a is also provided with a cleaning device 100 for removing fibers adhering to the outer peripheral surface of the third bottom roller 15a, similarly to the rear bottom roller 14a.

[0048] On the opposite side of each of the upper rollers 14b, 15b and 16b relative to each of the lower rollers 14a, 15a and 16a, a fiber recovery device 80 is arranged (at Figure 1 (omitted in ). Figure 3 As shown in FIG. 1 , the fiber recovery device 80 has a main body 81. A suction path 82 is provided on the main body 81. In addition, a suction port 83 is provided on the main body 81. Figure 3 In the figure, a part of the main body 81 is cut away to show the suction port 83. Only one suction port 83 is provided for the drafting device 6, and it faces the third bottom roller 15a.

[0049] A suction pipe 90 is connected to the downstream side of the suction path 82 (the end opposite to the suction port 83). The suction pipe 90 is connected to a blower (not shown) that generates a suction air flow. Thus, the fiber sheet generated in the drafting device 6 is sucked from the suction port 83, passes through the suction path 82 and the suction pipe 90, and reaches a fiber discharge device (not shown) provided near the blower.

[0050] Next, the details of the cleaning device 100 will be described. Hereinafter, the cleaning device 100 provided at the rear bottom roller 14a will be described as an example. The cleaning device 100 provided at the third bottom roller 15a has the same structure as the cleaning device 100 provided at the rear bottom roller 14a. Figure 4 It is an exploded perspective view of the cleaning device 100 . Figure 5 This is a cross-sectional view of the cleaning device 100 cut along a plane perpendicular to the width direction.

[0051] In this specification, the term "width direction" refers to the "axial direction" of the rollers (rotating bodies) such as the rear lower roller 14a in the drafting device 6. The term "height direction" corresponds to the "rotational direction" of the rollers (rotating bodies) such as the rear lower roller 14a in the drafting device 6, and refers to the linear direction of the rotational direction projected when the scraper 200 is observed from the front (i.e., when the scraper 200 is observed from the center X of the outer peripheral surface 14c). When observed from the front, the scraper 200 extends in the long side direction and the short side direction. The above-mentioned width direction corresponds to the long side direction, and the above-mentioned height direction corresponds to the short side direction. Figure 4 In the following drawings, at least one of the width direction d1 and the height direction d2 is also shown. The width direction d1 and the height direction d2 are orthogonal to each other.

[0052] like Figure 4 and Figure 5 As shown, the cleaning device 100 includes a scraper (cleaning device member) 200 and a pressing base portion 160 mounted on the back side of the scraper 200. The pressing base portion 160 includes a cover member 110, an inner yoke 120, and two magnets (pressing portions) 140. The cleaning device 100 is mounted on the rear bottom roller 14a by the magnetic force of the magnet 140 built into the pressing base portion 160. The opposing surface 202 of the scraper 200 is arranged opposite to the rear bottom roller 14a.

[0053] The cover member 110 is a housing that accommodates the magnet 140. The cover member 110 is formed in a box shape with one side facing the rear bottom roller 14a open. The cover member 110 has a pair of arms 112, a pair of gripping parts 113, four engaging parts 114, and two screws 115. The cover member 110 is made of resin, for example.

[0054] The scraper 200 is made of resin. The scraper 200 has a base portion 201 that is fitted into the pressing base portion 160. The base portion 201 is substantially rectangular and extends long in the width direction (long side direction). A pair of engaging plate portions 206 extending in the width direction d1 are provided on the back side of the base portion 201 (the side opposite to the side where the contact portion 204 described later is provided).

[0055] A metal base plate 111 is mounted on the box-shaped cover member 110. A hole is formed on the base plate 111 through which a screw 115 can be inserted. A pair of arms 112 extend outward from both ends of the base plate 111 in the width direction d1. In addition, the axial direction d1 of the rear bottom roller 14a refers to the extension direction of the rotation axis of the roller. Figure 2 As shown in FIG. 1 , a stopper 66 is provided on the upper surface of the rear roller housing 61. The operator installs the cleaning device 100 on the rear bottom roller 14a when the drafting device 6 is stopped. Figure 5 ) is arranged at a position upstream of the stopper 66, and the arm 112 is abutted against the front end of the stopper 66 by rotating the rear bottom roller 14a in the rotation direction dr. Thus, the rotation of the cleaning device 100 that attempts to rotate with the rear bottom roller 14a is blocked. The cleaning device 100 stays (rests) at a predetermined position in the rotation direction dr of the rear bottom roller 14a.

[0056] The pair of gripping parts 113 are the parts that the operator grips when removing the cleaning device 100 mounted on the rear bottom roller 14a. The pair of gripping parts 113 are respectively provided at both ends of the base plate 111 in the width direction d1. In addition, the gripping parts 113 extend from the base plate 111 to the downstream side in the rotation direction dr of the rear bottom roller 14a.

[0057] The four engaging portions 114 are respectively engaged with the four engaging holes 206a provided in the pair of engaging plate portions 206. The scraper 200 is fixed to the cover member 110 by snaps. The cover member 110 is mounted on the side opposite to the facing surface 202 of the scraper 200. Since the scraper 200 is fixed to the cover member 110 by snaps, the scraper 200 can be easily assembled and disassembled relative to the cover member 110. Therefore, when the scraper 200 is worn, the used scraper 200 can be easily replaced with a new scraper 200.

[0058] The inner yoke 120 changes the direction of the magnetic force of the magnet 140 so that the magnetic force of the magnet 140 acts toward the rear lower roller 14a side. The inner yoke 120 is a component having a roughly U-shaped cross-section. The inner yoke 120 is configured in such a way that the roughly U-shaped open portion faces the scraper 200 (in other words, the rear lower roller 14a). The base plate 111 and the inner yoke 120 are fixed to the cover member 110 by two screws 115. The base plate 111 and the inner yoke 120 can be fixed to the cover member 110 by using a mounting member other than the screws 115.

[0059] The two magnets 140 are arranged between the scraper 200 and the cover member 110. The two magnets 140 are, for example, accommodated in the cover member 110. By using the magnetic force to attract the magnets 140 to the rear bottom roller 14a, the two magnets 140 press the scraper 200 toward the outer peripheral surface 14c of the rear bottom roller 14a. The magnets 140 are adsorbed and fixed to the metal inner yoke 120 by magnetic force, and are positioned in the width direction d1 by the resin plate and the nut.

[0060] The scraper 200 extends along the width direction d1 of the rear bottom roller 14a, and is pressed against the outer peripheral surface 14c of the rotating rear bottom roller 14a by the magnetic force of the magnet 140. It should be noted that the width direction d1 of the rear bottom roller 14a refers to the extension direction of the rotation axis of the rear bottom roller 14a. The scraper 200 removes the fibers attached to the outer peripheral surface 14c of the rear bottom roller 14a by being pressed against the outer peripheral surface 14c of the rear bottom roller 14a. The scraper 200 is sometimes worn due to continuous contact with the rear bottom roller 14a. When the scraper 200 is worn, the scraper is removed from the cover member 110 and replaced.

[0061] Two contact portions 204 separated in the width direction d1 are provided on the opposing surface 202 of the base portion 201. The two contact portions 204 protrude from the opposing surface 202, respectively. The two contact portions 204 are formed, for example, to be plane-symmetrical with respect to a central plane orthogonal to the width direction d1. In the scraper 200, the base portion 201 including the opposing surface 202, the engaging plate portion 206, and the two contact portions 204 are formed integrally, for example, by injection molding. That is, the opposing surface 202 and the two contact portions 204 are formed integrally.

[0062] like Figure 4 and Figure 6 As shown, a low wall portion 207 is provided at the end portion on the downstream side in the rotation direction dr of the base portion 201. The low wall portion 207 is provided at a position including a substantially central portion in the width direction d1 of the base portion 201. The opposing surface 202 forms an intermediate flat portion 203 between the two contact portions 204. The intermediate flat portion 203 is continuous with the low wall portion 207. The intermediate flat portion 203 and the low wall portion 207 are provided at a position including an area through which the fibers wound around the outer peripheral surface 14c of the rear bottom roller 14a pass when the rear roller pair 14 drafts the sliver S in the width direction d1.

[0063] like Figures 4 to 6 As shown, the scraper 200 has an edge portion 208 for removing fibers attached to the outer peripheral surface 14c of the rear bottom roller 14a. The edge portion 208 is provided at the end portion on the upstream side of the rotation direction dr of the rear bottom roller 14a in the base portion 201. The edge portion 208 extends in a straight line in the width direction d1 (the long side direction of the scraper 200). The edge portion 208 is in line contact with the outer peripheral surface 14c of the rear bottom roller 14a along the width direction d1. Figure 4 and Figure 5 As shown, protrusions 205 are formed on both sides of the low wall portion 207 in the width direction d1, and the contact portion 204 is provided in a manner continuous with the protrusions 205. The contact portion 204 does not reach the edge portion 208 but ends midway. Two recesses 209 are formed between the contact portion 204 and the edge portion 208. The surface of the recess 209 is smoothly connected to the opposing surface 202 (without a step).

[0064] like Figures 4 to 6 As shown, the two contact parts 204 respectively have a first part 210, for example, a rectangle when viewed from the front, and two second parts 220 connected to both sides of the first part 210 in the height direction d2. The two second parts 220 are also, for example, rectangles when viewed from the front. The contact parts 204 are respectively substantially cross-shaped.

[0065] like Figure 5 As shown, the first surface 210a of the first part 210 and the second surface 220a of the second part 220 are in the shape of an arc having the same radius of curvature and the same center in a cross section orthogonal to the width direction d1. When the scraper 200 is in contact with the rear bottom roller 14a, the center of curvature of the first surface 210a and the second surface 220a is substantially consistent with the center X of the rear bottom roller 14a. That is, the first part 210 and the second part 220 have the same radius of curvature as the outer peripheral surface 14c so as to be assembled on the outer peripheral surface 14c of the rear bottom roller 14a. The first surface 210a and the second surface 220a are contact surfaces constituting a part of the cylindrical surface of a cylinder (imaginary cylinder).

[0066] In the scraper 200 , the second portion 220 as a planar protrusion effectively functions from the viewpoint of dispersing the pressing force. Hereinafter, features related to the shape and arrangement of the first portion 210 and the second portion 220 in the contact portion 204 will be described. Figure 7 It is a front view showing the outer shape of the contact portion 204 in the scraper 200 . Figure 7 The outline shown, excluding the tapered slope of the contact portion 204 rising from the opposing surface 202, corresponds to the intersection line (ridge line) of the slope with the first surface 210a and the second surface 220a.

[0067] like Figure 7 As shown, in the first portion 210 , the width A in the width direction d1 is greater than the height H in the height direction d2 . The width B in the width direction d1 of the connecting portion 222 of the second portion 220 and the first portion 210 is greater than 30% and less than 50% of the width A of the first portion 210 .

[0068] In the width direction d1 of the scraper 200, the spacing D between the two second parts 220 is more than 2 times and less than 2.5 times the spacing C between the two first parts 210. The two second parts 220 are arranged with a large separation in the width direction d1. With such a structure, it is possible to reliably ensure that the yarn S passes through the required spacing.

[0069] In addition, the two magnets 140 are separated in the width direction d1 and are arranged at positions corresponding to the two contact parts 204 (particularly the first part 210). In other words, each magnet 140 is arranged so as to overlap at least a portion of each first part 210 when viewed from the front. With such a structure, the cleaning device 100 can apply an appropriate pressing force at an appropriate position or area by the two magnets 140 corresponding to the two contact parts 204.

[0070] In each of the two contact portions 204, the second portion 220 is arranged outside the center portion in the width direction d1 of the first portion 210. With such a structure, the two second portions 220 can be further separated and arranged, and the required interval for the supply yarn S to pass can be easily ensured.

[0071] According to the cleaning device 100 of the rear bottom roller 14a of the present embodiment, the second part 220 connected to the first part 210 is respectively provided at the two contact parts 204 separated in the width direction d1. The width B of the connecting part 222 of the second part 220 and the first part 210 is 30% or more and 50% or less of the width A of the first part 210. The width of the connecting part 222 is wider than that of the existing cleaning device member. Therefore, the force applied to the outer peripheral surface 14c of the rear bottom roller 14a is dispersed over a wider range of the first part 210 and the second part 220 as a whole. As a result, the local contact of the rear bottom roller 14a with the outer peripheral surface 14c can be reduced.

[0072] The first surface 210a and the second surface 220a are formed into arcs having the same radius of curvature and the same center in a cross section orthogonal to the width direction d1. Thus, the second surface 220a of the second portion 220 stably contacts the outer peripheral surface 14c of the rear bottom roller 14a together with the first surface 210a of the first portion 210. Therefore, the force is more appropriately dispersed.

[0073] Each contact portion 204 is substantially in a cross shape. This can increase the contact area with the rear bottom roller 14a and improve the force dispersion effect.

[0074] The facing surface 202 and the contact portion 204 are formed integrally. Therefore, even if the contact portion 204 receives a friction force from the rear bottom roller 14a, the position of the contact portion 204 relative to the facing surface 202 does not shift.

[0075] According to the cleaning device 100, the contact portion 204 of the scraper 200 is pressed against the outer peripheral surface 14c of the rear bottom roller 14a by the magnetic force of the magnet 140. Since the force applied to the outer peripheral surface 14c of the rear bottom roller 14a is dispersed over a wide range of the first portion 210 and the second portion 220, the local contact of the rear bottom roller 14a with the outer peripheral surface 14c can be reduced.

[0076] Even when the scraper 200 is applied to the third bottom roller 15a, the same operational effects as described above can be achieved.

[0077] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment.

[0078] Alternatively, one magnet 140 may be disposed at the center of the width direction d1. One magnet 140 may be disposed so as to overlap at least a portion of the two first portions 210 when viewed from the front. In this case, the cleaning device 100 can correspond to the two contact portions 204 and apply a pressing force to the rear bottom roller 14a (or the third bottom roller 15a) via the two contact portions 204 using one magnet 140. The structure can be simplified.

[0079] In the width direction d1 , the spacing distance D between the two second portions 220 may be less than 2 times the spacing distance C between the two first portions 210 , or may be greater than 2.5 times.

[0080] The contact portion 204 can be deformed in various ways. Figure 8 As shown in FIG. 1 , a scraper 200A having two contact portions 204 that are not cross-shaped but are respectively substantially T-shaped may also be used. In the scraper 200A, in the first portion 210, the width A is greater than the height H. The width B of the connecting portion 222 of the second portion 220 and the first portion 210 is 30% or more and 50% or less of the width A of the first portion 210. In addition, the spacing distance D between the two second portions 220 is 2 times or more and 2.5 times or less of the spacing distance C between the two first portions 210.

[0081] like Fig. 9As shown, the two contact portions 204 are respectively cross-shaped, but the height H of the first portion 210 may not be constant. Specifically, in the width direction d1, the end of the first portion 210 located on the central side of the scraper 200B is called the first end, and the end located on the opposite side of the first end (i.e., the outside of the scraper 200) is called the second end. In this case, the height Ha of the first end of the first portion 210 is smaller than the height H of the second end. In the scraper 200B, in the first portion 210, the width A is greater than the height H, Ha. The width B of the connecting portion 222 of the second portion 220 and the first portion 210 is greater than 30% and less than 50% of the width A of the first portion 210. In addition, the spacing distance D between the two second portions 220 is greater than 2 times and less than 2.5 times the spacing distance C between the two first portions 210.

[0082] In these scrapers 200A and 200B, the same effects as those of the scraper 200 are achieved. In addition to the above, the second part 220 may be connected to only one side of the first part 210 in the height direction d2. The width of the second part 220 in the width direction d1 may become wider as it moves away from the first part 210 in the height direction d2. The outer contour line (ridge line) of the second part 220 in the width direction d1 may also be inclined relative to the height direction d2. As for the inner contour line (ridge line) of the second part 220 in the width direction d1, as long as it can prevent the yarn S from getting stuck (as long as it can allow the yarn S to pass smoothly), it may also be inclined relative to the height direction d2.

[0083] When the contact area between the contact portion 204 and the drafting roller is larger, the scraping force can be reduced. The surface area of ​​the contact portion 204 or the area of ​​the second surface 220a of the second portion 220 can be determined in consideration of the life of the resin material.

[0084] The air spinning device may include a pair of air jet nozzles for twisting the fiber bundle in directions opposite to each other, instead of the above-mentioned configuration.

[0085] In the spinning unit 2, the yarn accumulation device 11 has a function of drawing out the yarn Y from the air spinning device 7, but the yarn Y may be drawn out from the air spinning device 7 by using a delivery roller and a clamping roller. When the yarn Y is drawn out from the air spinning device 7 by using a delivery roller and a clamping roller, a relaxation pipe using a suction air flow may be provided instead of the yarn accumulation device 11. A mechanical compensator or the like may be provided instead of or in addition to the relaxation pipe.

[0086] In the spinning unit 2, instead of using the yarn joining device 26 to connect the two yarn ends, the yarn Y from the package P can be inserted into the air spinning device 7, and the yarn Y from the air spinning device 7 and the yarn Y of the package P can be connected (joined) by starting the stretching action of the stretching device 6 and the spinning action of the air spinning device 7.

[0087] In the spinning machine 1, the devices are arranged in the machine height direction so that the yarn Y supplied from the upper side is wound on the lower side. However, the devices may be arranged so that the yarn supplied from the lower side is wound on the upper side.

[0088] In the spinning machine 1, at least one of the lower rollers of the drafting device 6 and the traverse guide 23 are driven by the power from the second end frame 5 (i.e., in common to the plurality of spinning units 2). However, each part of the spinning unit 2 (e.g., the drafting device, the spinning device, the winding device, etc.) can also be driven independently for each spinning unit 2.

[0089] The tension sensor 9 may be arranged at a position upstream of the yarn monitoring device 8 in the traveling direction of the yarn Y. The unit controller 10 may be provided for each spinning unit 2. The waxing device 12, the tension sensor 9 and the yarn monitoring device 8 may be omitted in the spinning unit 2. When the yarn Y is not waxed, the waxing device 12 may not be omitted, and the wax may be removed from the waxing device 12.

[0090] exist Figure 1 In the figure, the spinning machine 1 is shown as winding a bobbin-shaped package P, but a conical package may be wound. In the case of a conical package, the slack of the yarn Y occurs due to the traversal of the yarn Y, but the slack can be absorbed by the yarn accumulation device 11. The materials and shapes of each structure are not limited to the above materials and shapes, and various materials and shapes can be used.

Claims

1. A member for a cleaning device of a drafting roller, extending in the long side direction and the short side direction, wherein: have: An opposing surface, disposed opposite to the drafting roller; and Two contact portions protrude from the opposing surface and are separated in a width direction corresponding to the long side direction. Each of the contact portions has: a first portion whose width in the width direction is greater than its height in the height direction corresponding to the short side direction; and a second portion connected to the first portion at least on one side in the height direction. A width of a connection portion between the second portion and the first portion in the width direction is not less than 30% and not more than 50% of a width of the first portion in the width direction.

2. The member for a cleaning device of a drafting roller according to claim 1, wherein: In the width direction, a spacing distance between two second portions is greater than or equal to 2 times and less than or equal to 2.5 times a spacing distance between two first portions.

3. The member for cleaning the drafting roller according to claim 1 or 2, wherein: In each of the contact portions, the second portion is arranged outside the center of the first portion in the width direction.

4. The member for a cleaning device of a drafting roller according to claim 1 or 2, wherein: The first surface of the first portion and the second surface of the second portion are arc-shaped with the same curvature radius and the same center in a cross section perpendicular to the width direction.

5. The member for a cleaning device of a drafting roller according to claim 1 or 2, wherein: In each of the contact portions, the second portion is connected to both sides of the first portion in the height direction, and each of the contact portions is substantially in a cross shape.

6. The member for cleaning the drafting roller according to claim 1 or 2, wherein: The facing surface and the contact portion are formed integrally.

7. The member for a cleaning device of a drafting roller according to claim 1 or 2, wherein: The first surface of the first portion and the second surface of the second portion are arc-shaped with the same curvature radius and the same center in a cross section perpendicular to the width direction. In each of the contact portions, the second portion is connected to both sides of the first portion in the height direction, and each of the contact portions is substantially in a cross shape. The facing surface and the contact portion are formed integrally.

8. A cleaning device, wherein: have: A member for a cleaning device of a drafting roller according to any one of claims 1 to 7; a cover member mounted on a side of the cleaning device member opposite to the opposing surface; as well as One or two magnets are disposed between the cleaning device member and the cover member.

9. The cleaning device according to claim 8, wherein: The two magnets are arranged to be separated from each other in the width direction.

10. The cleaning device according to claim 8, wherein: One of the magnets is disposed at the center in the width direction.

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