JP5807595B2 - Paper dust intrusion prevention device - Google Patents

Description

  The present invention relates to a paper dust intrusion prevention device for preventing paper dust from entering a roller bearing in contact with continuous paper.

  In a papermaking factory, sanitary paper such as tissue paper and toilet paper is manufactured as a continuous paper from a raw material pulp in a paper making process, and this is used as a roll. Moreover, the continuous paper drawn out from the raw fabric roll is wound around a roller and traveled, and is fed to a folding machine to form a laminated body such as tissue paper. Sanitary paper, which is continuous paper, is appropriately cut and boxed, packaged, and the like. In this series of manufacturing processes, for example, it is known that paper dust is generated when the direction of continuous paper transfer is changed by a roller and when the continuous paper is cut. Since it is not preferable that the paper dust generated in this way is mixed in the product, conventionally, various proposals for removing the paper dust have been made.

  For example, in Patent Document 1, a slit-shaped suction port is formed in a hollow round bar-like guide body itself on which continuous paper is wound, and the continuous paper is rubbed against the guide body by the suction device through the suction port. It is disclosed to suck and remove paper dust.

  Patent Document 2 discloses that high-speed air is discharged from the direction opposite to the running direction of the continuous paper toward the surface of the continuous paper, and the paper powder is detached from the paper surface by the centrifugal force applied to the paper powder and the discharge force of the high-speed air. A paper dust removing device that sucks paper dust with a suction device is disclosed.

Japanese Patent No. 3947195 JP 2002-200591 A

  By the way, in a manufacturing apparatus or a paper processing apparatus for paper products such as sanitary paper as described above, paper dust may enter a bearing that rotatably supports a roller around which continuous paper is wound, which may cause problems. For example, when paper dust enters the roller bearing and rotation failure of the roller occurs, the tension of the continuous paper changes, and as a result, wrinkles may occur in the continuous paper. In addition, the paper dust collected on the roller bearings may become solid and drop off from the paper and adhere to the paper surface, resulting in a reduction in product quality. Such troubles due to the paper powder entering the roller bearings can occur in the rollers in contact with various continuous papers, and it is desirable to prevent such troubles from occurring.

  Therefore, the present invention was devised in view of such points, and an object thereof is to provide a paper dust intrusion prevention device that prevents paper dust from entering a bearing that rotatably supports a roller that contacts continuous paper. To do.

One aspect of the present invention is a flow path that allows supply air between the inner ring and the outer ring of the bearing for rotatably supporting the roller in contact with the continuous paper, the inner ring is fixed, the said inner ring provided radially inwardly of the inner peripheral surface or the inner race and the circumferential flow path extending in the circumferential direction and a circumferential direction flow path and the radial flow passage connecting the opening formed in the inner ring, the flow path And a paper dust intrusion prevention device comprising an air supply device connected to the flow path . Alternatively, one aspect of the present invention is a flow path that enables air to be supplied between an inner ring and an outer ring of a bearing that rotatably supports a roller that is in contact with continuous paper, and the outer ring is fixed, comprising a circumferential channel extending circumferentially radially outside the outer peripheral surface or the outer race of the outer ring, and a radial passage connecting the opening formed in the circumferential direction flow path and the outer race, the flow Provided is a paper dust intrusion prevention device including a path and an air supply device connected to the flow path . According to such a configuration, air from the air supply device can be supplied to the bearing through the flow path, and paper dust can be prevented from entering the bearing by this air. Moreover, since the air supplied to the bearing via the flow path can flow out between the inner ring and the outer ring, paper dust can be more appropriately prevented from entering the bearing. Furthermore, the flow path can be formed so as to supply air to the bearing through a fixed member.

  More preferably, it further includes a partition member provided so as to define a space between the bearing and a suction device connected to a passage communicating with the space. By further providing such a configuration, even if paper dust reaches the periphery of the bearing, the paper dust can be more reliably sucked and removed from the bearing or the periphery thereof through the passage.

  According to the present invention, since the above-described configuration is provided, an extraordinary effect is achieved that paper dust can be more suitably prevented from entering a bearing that rotatably supports a roller in contact with continuous paper.

It is a schematic diagram showing a part of line in the paper processing apparatus to which the first embodiment of the paper dust intrusion prevention apparatus of the present invention is applied. It is an expansion schematic diagram of the support part of the roller in the apparatus of FIG. 1, and is a cross-sectional schematic diagram which shows 1st Embodiment of the paper dust intrusion prevention apparatus of this invention. It is a cross-sectional schematic diagram which shows 1st Embodiment of the paper dust penetration | invasion prevention apparatus of this invention along the III-III line of FIG. It is a cross-sectional schematic diagram which shows 2nd Embodiment of the paper dust penetration | invasion prevention apparatus of this invention. It is a cross-sectional schematic diagram which shows 2nd Embodiment of the paper dust penetration | invasion prevention apparatus of this invention along the VV line of FIG. It is a cross-sectional schematic diagram which shows 3rd Embodiment of the paper dust penetration | invasion prevention apparatus of this invention. It is a cross-sectional schematic diagram which shows 3rd Embodiment of the paper dust intrusion prevention apparatus of this invention along the VII-VII line of FIG. It is a cross-sectional schematic diagram which shows 4th Embodiment of the paper dust penetration | invasion prevention apparatus of this invention. It is a cross-sectional schematic diagram which shows 4th Embodiment of the paper dust penetration | invasion prevention apparatus of this invention along the IX-IX line of FIG.

  Embodiments according to the present invention will be described below with reference to the drawings. First, the paper dust intrusion prevention device 10 according to the first embodiment of the present invention will be described in detail below.

  FIG. 1 schematically shows a paper folding process line that is a part of a production line for sanitary paper (here, tissue paper). In the paper folding process line, the continuous paper P as a paper continuous body is pulled out from the roll P ′, and is folded upward in order to form a paper bundle continuous body P ″.

  In the paper product manufacturing apparatus or the paper processing apparatus, a part of which is shown in FIG. 1, a roller 12 is provided in the continuous paper P transfer path, and the continuous paper P is wound around the roller 12 to transfer the continuous paper. Etc. are to be converted. In addition, roller 12A, 12B of FIG. 1 is a direction change roller, and roller 12C is a bending roller. The paper dust intrusion prevention device 10 of the first embodiment is applied to a support portion that supports these rollers, particularly a bearing.

  FIGS. 2 and 3 show enlarged schematic views of a support portion at one end of any one of these rollers 12 (12A, 12B, 12C). However, continuous paper is not shown in FIGS. Note that the paper dust intrusion prevention device 10 may be applied to only one of the rollers 12A to 12C, and may be similarly applied to a roller of a paper processing device that is not shown in FIG.

  As shown in FIGS. 2 and 3, a roller (or roll) 12 as a guide body around which continuous paper is wound, that is, in contact with the continuous paper, is rotatably supported by a bearing 14. The roller 12 is a hollow round bar-shaped guide body, and the bearing 14 is positioned therein. Note that both ends of the roller 12 are rotatably supported by bearings 14 respectively.

  The bearing 14 is fitted on a support shaft 18 that is fixed so as to penetrate the fixed frame 16 in the thickness direction. The support shaft 18 has a frame fitting portion 18a, a bearing fitting portion 18b, and a cylindrical spacer portion 18c protruding between them in the radial direction over the entire circumference. The support shaft 18 is integrally formed as a whole. However, the support shaft 18 may be configured by assembling a plurality of members. For example, the support shaft 18 may be formed by attaching a ring-shaped portion corresponding to the spacer portion 18 c to the stepped cylindrical portion.

  The bearing 14 is a rolling bearing, and more specifically a ball bearing. The bearing 14 includes an inner ring 14a, an outer ring 14b, and a plurality of balls 14c serving as rolling elements interposed therebetween. This bearing 14 is configured as a shield type bearing as shown in the figure.

  The inner ring 14 a of the bearing 14 is attached to the support shaft 18 so that the inner peripheral surface thereof is in contact with the outer peripheral surface of the bearing fitting portion 18 b of the support shaft 18. Further, the outer ring 14 b of the bearing 14 is attached to the roller 12 so that the outer peripheral surface thereof is in contact with the inner surface that defines the hollow interior 12 a of the roller (roller shell) 12. The bearing 14 is press-fitted between the roller 12 and the support shaft 18. Although the side surface or the end surface of the inner ring 14 a is in contact with the ring-shaped portion of the support shaft 18, that is, the spacer portion 18 c, the outer ring 14 b is not in contact with the support shaft 18.

  The inner ring 14a attached to the fixed frame 16 via the support shaft 18 does not rotate. On the other hand, the outer ring 14 b can rotate together with the roller 12. In this manner, the roller 12 is rotatably supported by the bearing 14.

  Now, a flow path (or a passage) 20 that enables supply of air to such a bearing 14 is formed. In addition, the opening part 20a of the flow path 20 is located in the bearing 14, and is specifically formed so that it may open to the outer peripheral surface of the inner ring | wheel 14a.

  The flow path 20 includes, in addition to the opening 20a, an axial flow path 20b that passes through the support shaft 18 in the axial direction along the axis of the support shaft 18 (which overlaps the axis of the roller 12), and a radially inner side of the inner ring 14a. A circumferential flow passage 20c extending in the circumferential direction, an inner radial flow passage 20d connecting the axial flow passage 20b and the circumferential flow passage 20c, and an opening formed in the circumferential flow passage 20c and the inner ring 14. And an outer radial flow path 20e connecting to 20a. However, the axial flow path 20b, the inner radial flow path 20d, and the circumferential flow path 20c are formed on the support shaft 18. The outer radial flow path 20e is formed in the inner ring 14a. However, the circumferential flow path 20c may be formed on the inner peripheral surface of the inner ring 14a, or may be partially formed on both the inner ring 14a and the support shaft 18.

  The flow paths 20b to 20e are positioned and formed so as to communicate with each other when the bearing 14 is attached in contact with the spacer portion 18c of the support shaft 18.

  And the pump 24 is connected to the axial direction flow path 20b of the spindle 18 through the pipe | tube 22 which forms a part of flow path 20 similarly. The tube 22 may be omitted. The pump 24 is provided as an air supply device, and is connected to the flow path 20 in order to supply air to the bearing 14.

  In the paper dust intrusion prevention device 10 having such a configuration, compressed air is supplied from the pump 24 to the flow path 20. The air passes through the flow path 20 and is supplied between the inner ring 14a and the outer ring 14b of the bearing 14 from the opening 20a. Then, the air flows out from between the inner ring 14a and the outer ring 14b of the bearing 14. Such air outflow action prevents paper dust from entering the bearing 14. Such an air flow is schematically represented by arrows in FIGS. 2 and 3. Note that paper dust may be generated due to rubbing between the roller 12 and the continuous paper P, cutting of the continuous paper P, or the like.

  The spacer portion 18c of the support shaft 18 also has a role of allowing a certain amount of air to flow out from the bearing 14 to the fixed frame 16 side.

  Next, a second embodiment according to the present invention will be described in detail below with reference to FIGS. However, the paper dust intrusion prevention device 110 according to the second embodiment includes a suction device and a configuration associated therewith in addition to the configuration of the paper dust intrusion prevention device 10. Therefore, in the following description of the second embodiment, differences from the first embodiment will be mainly described, and the same reference numerals are used for the same or corresponding components as those already described. A duplicate description of the components is omitted.

  The paper dust intrusion prevention device 110 according to the second embodiment has a configuration that makes it possible to remove the paper dust even if the paper dust is caught in the air flowing out from the bearing 14 and flows into the roller 12. Have. This configuration is described below.

  A partition member 30 is installed in the internal cavity 12 a of the roller 12. The partition member 30 includes an edge portion 30 a that abuts over the entire circumference of the cylindrical inner surface of the roller 12, and has a substantially disk shape. The partition member 30 is installed at a predetermined distance from the bearing 14 and defines a space S <b> 1 between the bearing 14 and the roller 12.

  A flow path (or passage) 32 is formed in the support shaft 18. Here, the flow path 32 is referred to as a second flow path (or suction flow path) in order to distinguish it from the air supply flow path 20, and the flow path 20 is referred to as the first flow path (or supply flow). Road).

  The flow path 32 is formed in the support shaft 18 so as to extend in the axial direction of the support shaft 18. The flow path 32 has an opening 32 a that opens to the end face 18 d on the bearing fitting portion 18 b side of the support shaft 18, and communicates with the space S <b> 1 between the partition member 30 and the bearing 14.

  A pump 34 as a suction device is connected to the axial flow path of the support shaft 18 through a pipe 36 that similarly defines a part of the flow path 32. It should be noted that the tube 36 can be omitted. The pump 34 acts to suck the gas in the space S1 through the second flow path or the suction flow path 32, and in some cases, gas containing paper dust. Such a gas flow is schematically represented by arrows in FIG.

  However, the pump 34 may be operated when air is supplied from the pump 24 as an air supply device through the first flow path or the supply flow path 20 and does not operate when the pump 24 is stopped. This is to prevent paper dust from being drawn into the space S1 by the suction action of the pump 34.

  Next, a third embodiment according to the present invention will be described in detail below with reference to FIGS. However, in the following description of the third embodiment, differences from the first embodiment are mainly described, and the same reference numerals are used for the same or corresponding components as those already described. A duplicate description of the components is omitted.

  In the paper dust intrusion prevention device 210 of the third embodiment, the roller 12 has a support shaft 18, and a bearing 14 is attached to the outer periphery of the support shaft 18. A flow path 220 is formed in the fixed frame 16. The bearing 14 may be simply press-fitted into the frame 16. Alternatively, the bearing 14 may be fixed to the frame 16 by dividing a portion of the frame 16 to which the bearing is attached and attaching one to the other by mechanical means such as a bolt.

  The flow path 220 that can supply air to the bearing 14 has an opening 220 a that opens to the bearing 14. The opening 220a is formed to open on the inner peripheral surface of the outer ring 14b.

  In addition to the opening 220a, the flow path 220 includes an outer radial flow path 220b formed in the frame 16, a circumferential flow path 220c extending in the circumferential direction on the radial outer side of the outer ring 14b, and a circumferential flow path. 220d and an inner radial flow path 220d that connects the opening 220a formed in the outer ring 14b. However, the outer radial flow path 220 b and the circumferential flow path 220 c are formed in the frame 16. The inner radial flow path 220d is formed in the outer ring 14b. However, the circumferential flow path 220c may be formed on the outer peripheral surface of the outer ring 14b, or may be partially formed on both the outer ring 14b and the frame 16.

  The flow paths 220b to 220d are positioned so as to communicate with each other when the bearing 14 is attached in contact with the small diameter portion 16a of the frame 16.

  The pump 24 is connected to the flow path of the frame 16 through a pipe 222 that similarly defines a part of the flow path 220. Note that the tube 222 can be omitted. The pump 24 is provided as an air supply device, and is connected to the flow path 220 for supplying air to the bearing 14.

  In the paper dust intrusion prevention device 210 having such a configuration, compressed air is supplied from the pump 24 to the flow path 220. Air passes through the flow path 220 and is supplied between the inner ring 14a and the outer ring 14b of the bearing 14 from the opening 220a. Then, the air flows out from between the inner ring 14a and the outer ring 14b of the bearing 14. Such air outflow action prevents paper dust from entering the bearing 14. Note that such an air flow is schematically represented by arrows in FIGS. 6 and 7.

  Next, a fourth embodiment according to the present invention will be described in detail below with reference to FIGS. However, the paper dust intrusion prevention device 310 of the fourth embodiment includes a suction device and a configuration associated therewith in addition to the configuration of the paper dust intrusion prevention device 210 of the third embodiment. The relationship between the third embodiment and the fourth embodiment is the same as the relationship between the first embodiment and the second embodiment. Therefore, in the following description of the fourth embodiment, differences from the third embodiment are mainly described, and the same reference numerals are used for the same or corresponding components as those already described. A duplicate description of the components is omitted.

  The paper dust intrusion prevention device 310 according to the fourth embodiment has a configuration that makes it possible to remove paper dust even if the paper dust reaches the periphery of the bearing 14. This configuration is described below.

  The fixed frame 16 is provided with a first partition member 330A and a second partition member 330B. The first partition member 330A is a substantially donut-shaped member, and the second partition member 330B is a substantially ring-shaped member. The first partition member 330A is provided on the opposite side of the frame 16 from the side on which the second partition member 330B is provided.

  The first partition member 330 </ b> A is provided on the opposite side (the opposite roller side) of the frame 16 from the roller 12, and is formed so as to define the first space S <b> 2 between the first partition member 330 </ b> A and the bearing 14. In contrast, the second partition member 330B is provided on the roller side of the frame 16, and is formed so as to define the second space S3 between the bearing 14 and the second partition member 330B. The first partition member 330A and the second partition member 330B are disposed away from the roller 12 and the support shaft 18, respectively. However, the gap between them is set to be as small as possible.

  A flow path 332 is formed in the frame 16. Here, this flow path 332 is referred to as a second flow path (or suction flow path) in order to distinguish it from the air supply flow path 220, whereas the flow path 220 is referred to as the first flow path (or supply flow path). ).

  The flow path 332 extends in the axial direction of the roller 12 in the frame 16 and is also formed so as to penetrate the first partition member 330A. The flow path 332 has an opening 332a that opens to the first space S2 and an opening 332b that opens to the second space S3, and communicates with these spaces S2 and S3.

  The flow path 332 is connected to a pump 34 as a suction device. The pump 34 acts to suck the gas in the spaces S2 and S3, and possibly the gas containing paper dust, through the second flow path or the suction flow path 332. Such an air flow is schematically represented by arrows in FIG.

  However, the pump 34 may be operated when air is supplied from the pump 24 as an air supply device through the first flow path or the supply flow path 220, and does not operate when the pump 24 is stopped. This is to prevent paper dust from being drawn into the spaces S2 and S3, particularly into the space S2, by the suction action of the pump 34.

  As mentioned above, although this invention was demonstrated based on 1st-4th embodiment, this invention is not limited to these, Other embodiment is accept | permitted. For example, the second partition member 330B of the fourth embodiment can be applied to the second embodiment. In addition, any one of the first and second partition members 330A and 330B of the fourth embodiment can be omitted.

  Moreover, in the said embodiment, although the bearing was a ball bearing, it may be a roller bearing which is another type of bearing, for example, a rolling bearing. Moreover, although the said bearing was a shield type bearing, it does not need to be a shield type. For example, the bearing to which the present invention is applied may be a sealed bearing, or a bearing having neither a sealing member nor a shielding member. The bearing can be any bearing. Therefore, the air supply flow paths 20 and 220 are not limited to being configured to communicate with the space or region between the inner ring and the outer ring so as to supply air between them. The air may be configured to be supplied to various parts of the bearing so that the powder does not chew or enter. In addition, the air supply flow path, that is, the supply flow path, and the suction flow path, that is, the suction flow path are not limited to the above-described embodiment, and may be formed in various members with various shapes and routes. it can. Furthermore, the position and number of the openings of the flow paths are not limited to the above embodiment. For example, the number of openings in the flow path may be one, or two or more and a plurality of openings.

  Further, the present invention described in the above embodiment can be applied to any roller as long as it is a roller around which continuous paper is wound. Furthermore, in the said embodiment, one bearing was arrange | positioned at the one end part of the roller. However, the present invention is also applicable to a roller in which two or more bearings are arranged at one end. For example, when two bearings are provided at one end of the roller, a flow path may be formed so as to supply air between the bearings, and air may be pumped into the flow path from the pump. Furthermore, the present invention is similarly used for rollers of various paper processing apparatuses used for making paper products other than sanitary paper (for example, tissue paper, dust paper, paper towel (for example, kitchen paper), toilet paper). Can do.

  As described above, the present invention has been described based on the above-described embodiment and its modifications. However, the present invention is not limited to the above embodiment and the like, and other embodiments are allowed. The present invention includes all modifications, applications, and equivalents included in the spirit of the present invention defined by the claims.

10, 110, 210, 310 Paper dust intrusion prevention device 12 Roller 14 Bearing 16 Frame 18 Support shaft 20, 220 Flow path 24 Pump (air supply device)
30, 330A, 330B Partition member 34 Pump (suction device)

Claims (3)

A flow path that enables air to be supplied between an inner ring and an outer ring of a bearing that rotatably supports a roller that is in contact with continuous paper, the inner ring being fixed, and the inner ring surface of the inner ring or the inner ring A flow path comprising: a circumferential flow path extending radially inward in the circumferential direction; and a radial flow path connecting the circumferential flow path and an opening formed in the inner ring ;
A paper dust intrusion prevention device comprising an air supply device connected to the flow path. A flow path that enables air to be supplied between an inner ring and an outer ring of a bearing that rotatably supports a roller in contact with the continuous paper, the outer ring being fixed, and an outer peripheral surface of the outer ring or a diameter of the outer ring A flow path comprising a circumferential flow path extending in the circumferential direction on the outer side, and a radial flow path connecting the circumferential flow path and the opening formed in the outer ring;
An air supply device connected to the flow path;
A paper dust intrusion prevention device. A partition member provided to define a space between the bearings;
A suction device connected to a passage communicating with the space;
Further Ru comprising a paper dust intrusion preventing device according to claim 1 or 2.

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