Conveying roller

Abstract

The conveyance roller includes a roller body, a rotating member, a permanent magnet, and a hysteresis material. A columnar shaft member is inserted into the roller body and the rotating member. The roller body is provided so as to be rotatable with respect to the shaft member and cover the outside of the central portion of the shaft member. The rotating member has a driven portion provided on the outside of the roller body in the axial direction of the shaft member, and rotates with respect to the shaft member as the driven portion is driven by the drive source to rotate. The permanent magnet is provided on the inner side of the roller body and is fixed to one of the rotating member and the roller body. The hysteresis material is fixed to the other of the rotating member and the roller body so as to face the permanent magnet in the radial direction of the roller body, and hysteresis torque is generated between the hysteresis material and the permanent magnet.

Description

Technical Field

[0001] The invention relates to a conveyor roller used in an accumulation conveyor. Background Art

[0002] As one type of roller conveyor used to convey articles in factories, etc., an accumulation conveyor is known. The accumulation conveyor has a function of temporarily retaining articles being conveyed.

[0003] For example, the roller conveyor device described in Patent Document 1 includes a plurality of conveying rollers, a driving unit for rotating the conveying rollers, and a stopper for temporarily retaining an object conveyed by the conveying rollers on the conveying rollers. The conveying roller includes: a shaft; a roller body arranged on the outer periphery of the shaft via a bearing; a rotating body arranged in contact with one end surface of the roller body; and at least two bearings for the rotating body arranged between the rotating body and the shaft. The stopper is configured to be able to protrude relative to the conveying surface formed by the plurality of conveying rollers.

[0004] In the roller conveyor device disclosed in Patent Document 1, the rotating body of each conveying roller is driven to rotate by a driving member. The rotation of the rotating body is transmitted to the roller body by the friction force generated between the rotating body and the roller body. As a result, the roller bodies of the plurality of conveying rollers rotate, and the objects are conveyed.

[0005] In addition, the movement of the object can be stopped by making the top end of the stopper protrude relative to the conveying surface and contact the object. At this time, the rotating body rotates while sliding relative to the roller body. That is, the conveying roller functions as a stacking roller.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2021-123482 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] However, when the conveying roller disclosed in Patent Document 1 functions as a stacking roller, as described above, the rotating body rotates while sliding relative to the roller body, thereby causing wear of the rotating body. When the wear amount of the rotating body increases, the rotation cannot be efficiently transmitted from the rotating body to the roller body. In other words, the function as a conveying roller is reduced. Thus, in the structure disclosed in Patent Document 1, the rotating body wears according to the length of time the conveying roller functions as a stacking roller. Therefore, it is difficult to increase the life of the conveying roller.

[0011] Therefore, an object of the present invention is to provide a long-life conveying roller capable of functioning as a stacking roller.

[0012] Solutions for solving problems

[0013] The gist of the present invention resides in the following conveying roller.

[0014] (1) A conveyor roller used in an accumulation conveyor having a driving source, wherein:

[0015] The conveyor roller has:

[0016] a cylindrical roller body which is inserted into the columnar shaft member so as to be rotatable relative to the columnar shaft member and to cover the outside of the central portion of the shaft member;

[0017] a rotating member having a driven portion provided outside the roller body in the axial direction of the shaft member, the rotating member being rotated relative to the shaft member by the shaft member being inserted so as to be rotatable relative to the shaft member and the roller body and the driven portion being driven and rotated by the driving source;

[0018] a permanent magnet provided inside the roller body and fixed to one of the rotating member and the roller body; and

[0019] A hysteresis material is fixed to the other of the rotating member and the roller body so as to face the permanent magnet in a radial direction of the roller body and be separated from the permanent magnet, and a hysteresis torque is generated between the hysteresis material and the permanent magnet.

[0020] (2) The conveying roller according to (1) above, wherein:

[0021] The rotating member has a cylindrical support portion, at least a portion of which is located inside the roller body, and the support portion rotates integrally with the driven portion with the shaft member as a rotation center.

[0022] The permanent magnet is fixed to one of the outer peripheral surface of the support portion and the inner peripheral surface of the roller body.

[0023] The hysteresis material is fixed to the other of the outer peripheral surface and the inner peripheral surface.

[0024] (3) The conveying roller according to (2) above, wherein:

[0025] The conveyor roller also has:

[0026] a first bearing supported by the support portion and supporting the roller body so that the roller body can rotate relative to the rotating member; and

[0027] The second bearing is supported by the shaft member and supports the roller body so that the roller body is rotatable relative to the shaft member.

[0028] (4) The conveying roller according to (3) above, wherein:

[0029] The first bearing is supported by the rotating member so as to be movable in the axial direction relative to the rotating member.

[0030] The second bearing is supported by the shaft member so as to be movable in the axial direction relative to the shaft member.

[0031] (5) The conveying roller according to any one of (1) to (4) above, wherein:

[0032] The transport roller further includes an adjustment mechanism that adjusts a position of the roller body relative to the rotating member in the axial direction.

[0033] (6) The conveying roller according to any one of (1) to (4) above, wherein:

[0034] The permanent magnet has a cylindrical shape and has a structure in which different poles are magnetized alternately in a circumferential direction.

[0035] Effects of the Invention

[0036] According to the present invention, a long-life conveying roller capable of functioning as a stacking roller can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic plan view showing an accumulation conveyor including conveying rollers according to one embodiment of the present invention.

[0038] Figure 2 It is a schematic diagram showing a conveying roller.

[0039] Figure 3 This is a diagram for explaining a method of adjusting the hysteresis torque.

[0040] Figure 4 It is a diagram showing another example of the adjustment mechanism. DETAILED DESCRIPTION

[0041] The conveyor roller of the present invention will be described in detail below. The conveyor roller of the present invention can be used as an accumulation roller in an accumulation conveyor having a plurality of rollers. First, the accumulation conveyor will be briefly described.

[0042] (Conveyor structure)

[0043] Figure 1 FIG. 1 is a top view showing an accumulation conveyor equipped with conveying rollers according to an embodiment of the present invention. Figure 1As shown, the stacking conveyor 1 includes: a plurality of conveying rollers 10 according to one embodiment of the present invention; a pair of frames 2 that support the plurality of conveying rollers 10; a driving source 3 that is used to drive the plurality of conveying rollers 10 to rotate; and a transmission member 4 that is used to transmit the driving force generated by the driving source 3 to the plurality of conveying rollers 10.

[0044] In addition, as the frame 2, a frame used in a known roller conveyor can be used, so detailed description is omitted, but in this embodiment, the frame 2 has an upper wall portion 2a in a substantially C-shaped manner when viewed from the front, a lower wall portion (not shown) provided below the upper wall portion 2a in a manner opposite to the upper wall portion 2a, and a vertical wall portion 2b extending in the up-down direction to connect the upper wall portion 2a and the lower wall portion. In addition, as the drive source 3 and the transmission member 4, a drive source and a transmission member used in a known roller conveyor can be used, so detailed description is omitted, but the drive source 3 is, for example, an electric motor, and the transmission member 4 is, for example, a roller chain.

[0045] (Conveyor Roller Structure)

[0046] Figure 2 1 is a schematic diagram showing the conveying roller 10. Figure 2 (a) is a top view of the conveying roller 10, Figure 2 (b) means Figure 2 The cross-sectional view of the bb part of (a). Figure 2 As shown in FIG. 2 ( b ), the transport roller 10 includes a shaft member 12 , a roller body 14 , a rotating member 16 , a plurality of permanent magnets 18 , and a plurality of hysteresis materials 20 .

[0047] In the present embodiment, the shaft member 12 has a substantially cylindrical shape. Figure 1 As shown, both ends of the shaft member 12 are supported on the frame 2 (vertical wall portion 2b). In the present embodiment, the shaft member 12 is mounted on the pair of frames 2 in a state where the rotation relative to the pair of frames 2 is restricted. In addition, the method of mounting the shaft member 12 on the frame 2 is the same as the method of mounting the shaft member on the frame in the known stacking conveyor, so the detailed description is omitted.

[0048] like Figure 1 and Figure 2 As shown, the roller body 14 has a cylindrical shape. The roller body 14 is made of, for example, a non-magnetic material. In the present embodiment, the shaft member 12 is inserted into the roller body 14 in a manner that penetrates the roller body 14. More specifically, the shaft member 12 is inserted into the roller body 14 in a manner that the outer side of the central portion in the axial direction (length direction) of the shaft member 12 is covered by the roller body 14. The roller body 14 is supported by the shaft member 12 and the rotating member 16 in a manner that it can rotate relative to the shaft member 12 and the rotating member 16, and the details will be described later.

[0049] like Figure 2 As shown, the rotating member 16 has a substantially cylindrical shape. In the present embodiment, the shaft member 12 is inserted into the rotating member 16 in a manner that penetrates the rotating member 16. In the present embodiment, the rotating member 16 is supported by the shaft member 12 in a manner that allows it to move in the axial direction (length direction) of the shaft member 12. In addition, in the following description, the case of simply referring to the axial direction refers to the axial direction (length direction) of the shaft member 12.

[0050] The rotating member 16 has a sprocket portion 60, a support portion 62, and an adjustment portion 64. The sprocket portion 60, the support portion 62, and the adjustment portion 64 are integrally formed. In the present embodiment, the sprocket portion 60 corresponds to a driven portion.

[0051] The sprocket part 60 is provided outside the roller body 14 in the axial direction. A plurality of teeth 60a are provided on the outer periphery of the sprocket part 60. The support part 62 has a cylindrical shape. The support part 62 is provided inside the roller body 14. More specifically, the support part 62 is provided coaxially with the shaft member 12 and the roller body 14.

[0052] The adjustment portion 64 has a cylindrical shape and is provided between the sprocket portion 60 and the support portion 62 in the axial direction. A plurality of annular grooves 64a are formed on the outer peripheral surface of the adjustment portion 64.

[0053] The rotating member 16 is supported by the shaft member 12 in a manner that allows rotation relative to the shaft member 12. In the present embodiment, a bearing 30 is provided inside the sprocket portion 60. In addition, various known bearings (rolling bearings, sliding bearings, etc.) can be used as the bearing 30. The same applies to the bearings 32, 34, and 36 described later.

[0054] like Figure 1 As shown, the transmission member (roller chain) 4 is mounted on the sprocket portion 60 of each conveying roller 10. The driving force generated by the driving source 3 is transmitted to the sprocket portions 60 of the plurality of conveying rollers 10 via the transmission member 4. That is, the plurality of sprocket portions 60 are simultaneously driven and rotated by the driving source 3. As a result, in each conveying roller 10, the rotating member 16 rotates relative to the shaft member 12.

[0055] like Figure 2 As shown in (b), the end of one side in the axial direction of the roller body 14 is supported by the support portion 62 of the rotating member 16 via the bearing 32, and the end of the other side in the axial direction of the roller body 14 is supported by the shaft member 12 via the bearing 34. Thus, the roller body 14 can rotate relative to the shaft member 12 and the rotating member 16. In the present embodiment, the bearing 32 corresponds to the first bearing, and the bearing 34 corresponds to the second bearing. In addition, in the present embodiment, the roller body 14 is also supported by the bearing 36 provided at the top end portion of the support portion 62 (the end of the other side in the axial direction of the support portion 62).

[0056] In the present embodiment, the bearings 32, 34, and 36 are mounted on the roller body 14 in a manner that they cannot move in the axial direction relative to the roller body 14. In addition, the bearings 32 and 36 are supported by the support portion 62 in a manner that they can move in the axial direction relative to the support portion 62 (rotating member 16), and the bearings 30 and 34 are supported by the shaft member 12 in a manner that they can move in the axial direction relative to the shaft member 12.

[0057] like Figure 2 As shown, an annular locking member 38 is embedded in one of the plurality of grooves 64a of the adjustment portion 64. As the locking member 38, for example, a known retaining ring can be used. A cylindrical collar 40a is embedded in the shaft member 12 on one side in the axial direction of the rotating member 16. Figure 1 As shown, the collar 40a is provided between the vertical wall portion 2b of the frame 2 and the rotating member 16. Although detailed description is omitted, in the present embodiment, the end portion of the collar 40a on one side in the axial direction is configured to be able to be locked to the vertical wall portion 2b of the frame 2, and the end portion of the collar 40a on the other side in the axial direction is configured to be able to be locked to the bearing 30. In such a structure, the movement of the rotating member 16 to one side in the axial direction relative to the shaft member 12 is restricted by the bearing 30, the collar 40a and the vertical wall portion 2b.

[0058] In addition, a cylindrical collar 40b is embedded in the shaft member 12 on the other side in the axial direction of the bearing 34. Moreover, a fastening member 42 is embedded in the shaft member 12 on the other side in the axial direction of the collar 40b. As the fastening member 42, a nut is used, for example. In this case, a thread groove for mounting the nut is formed on the outer peripheral surface of the shaft member 12.

[0059] In the present embodiment, by tightening the tightening member 42, the collar 40b can be pressed against the bearing 34. Thus, the roller body 14 and the bearing 32 mounted on the roller body 14 are pressed toward one side in the axial direction relative to the shaft member 12. As a result, the bearing 32 is locked by the locking member 38 mounted on the adjustment portion 64. Thus, the position of the roller body 14 relative to the rotating member 16 in the axial direction is fixed. In addition, by pressing the roller body 14 and the bearing 32 toward one side in the axial direction, the rotating member 16 locked to the bearing 32 by the locking member 38 is also pressed toward one side in the axial direction. However, as described above, the movement of the rotating member 16 toward one side in the axial direction relative to the shaft member 12 is restricted by the bearing 30, the collar 40a and the vertical wall portion 2b. With such a structure, the tightening member 42 can be appropriately tightened. In the present embodiment, the plurality of grooves 64a, the collar 40b and the tightening member 42 function as an adjustment mechanism for adjusting the position of the roller body 14 relative to the rotating member 16 in the axial direction, and the details will be described later.

[0060] The plurality of permanent magnets 18 are fixed to the outer peripheral surface of the support portion 62. In the present embodiment, the plurality of permanent magnets 18 are fixed to the outer peripheral surface of the support portion 62 so as to be separated from each other in the axial direction. In the present embodiment, the permanent magnets 18 have a cylindrical shape and have a structure in which different poles are alternately magnetized in the circumferential direction.

[0061] As the permanent magnet 18, a known magnet such as a ferrite magnet or a rare earth magnet can be used. From the viewpoint of miniaturization of the conveying roller 10 and improvement of the hysteresis torque described later, as the permanent magnet 18, for example, a rare earth magnet such as an Nd-Fe-B magnet, an Sm-Fe-N magnet, and an Sm-Co magnet is preferably used.

[0062] The plurality of hysteresis materials 20 are fixed to the roller body 14 in a manner that they are opposite to the plurality of permanent magnets 18 in the radial direction of the roller body 14 and separated from the plurality of permanent magnets 18 in the radial direction of the roller body 14. In the present embodiment, the hysteresis material 20 has a cylindrical shape and is fixed to the inner peripheral surface of the roller body 14 by means of a fixing member 22. The fixing member 22 has a cylindrical outer peripheral portion 22a and a protrusion 22b protruding radially inward from the outer peripheral portion 22a. The hysteresis material 20 is fixed to the top end of the protrusion 22b. The fixing member 22 is made of, for example, a resin material.

[0063] The hysteresis material 20 is made of, for example, a semi-hard magnetic material. Specifically, for example, the hysteresis material 20 can be manufactured by subjecting a semi-hard magnetic material such as a Fe-Cr-Co alloy or a Fe-Co alloy to a predetermined magnetic field treatment. In the present embodiment, the residual magnetic flux density of the hysteresis material 20 is preferably greater than 0.7 T, and the coercive force is preferably greater than 10 kA / m.

[0064] (Movement of the conveyor roller)

[0065] When conveying articles by the accumulation conveyor 1, the rotating member 16 of each conveying roller 10 is driven to rotate by the driving source 3. As a result, in each conveying roller 10, the permanent magnet 18 rotates with the shaft member 12 as the rotation center, and a hysteresis torque is generated between the permanent magnet 18 and the hysteresis material 20. As a result, in conjunction with the rotation of the plurality of permanent magnets 18, the plurality of hysteresis materials 20, the plurality of fixing members 22, and the roller body 14 rotate with the shaft member 12 as the rotation center. By rotating the roller bodies 14 of the plurality of conveying rollers 10 in this way, articles can be conveyed.

[0066] On the other hand, in the accumulation conveyor 1, when the conveyance of the article is stopped by a stopper (not shown), the transmission of the rotation from the rotating member 16 to the roller body 14 can be cut off. Specifically, when the load applied from the article to the roller body 14 exceeds the torque (magnetic attraction) generated between the plurality of permanent magnets 18 and the plurality of hysteresis materials 20, the rotating member 16 and the plurality of permanent magnets 18 idle relative to the roller body 14 and the plurality of hysteresis materials 20. In this way, the conveying roller 10 of the present embodiment functions as an accumulation roller.

[0067] Furthermore, in the present embodiment, by adjusting the position of the roller body 14 in the axial direction relative to the rotating member 16 , it is possible to adjust the magnitude of the hysteresis torque generated between the plurality of permanent magnets 18 and the plurality of hysteresis materials 20 . Figure 3 is a diagram for explaining the method of adjusting the hysteresis torque. Figure 3 1 shows the peripheral portion of the rotating member 16 in the conveying roller 10 .

[0068] As described above, a plurality of grooves 64a are formed on the outer peripheral surface of the adjustment portion 64 of the rotating member 16. Figure 3 As shown in FIG. 1 , by changing the groove 64 a into which the locking member 38 is inserted, the position of the roller body 14 relative to the rotating member 16 can be changed. Figure 3 In the conveying roller 10 shown in (a), the locking member 38 is embedded in the groove 64a closest to the support portion 62 among the plurality of grooves 64a. Figure 3 In the conveying roller 10 shown in (b), the locking member 38 is embedded in the third groove 64a from the support portion 62 side among the plurality of grooves 64a. As described above, in this embodiment, by fastening the fastening member 42 (see Figure 2 ) and the bearing 32 is locked to the locking member 38, thereby fixing the position of the roller body 14 relative to the rotating member 16 in the axial direction. Figure 3 Compared with the conveying roller 10 shown in (a), Figure 3 In the transport roller 10 shown in (b), the roller body 14 is located on the support portion 62 side in the axial direction.

[0069] In the present embodiment, a plurality of permanent magnets 18 are fixed to the rotating member 16 (supporting portion 62), and a plurality of hysteresis materials 20 are fixed to the roller body 14. Therefore, by adjusting the position of the roller body 14 in the axial direction relative to the rotating member 16 as described above, the relative area between the permanent magnets 18 and the hysteresis materials 20 in the radial direction of the roller body 14 can be adjusted. As a result, the magnitude of the hysteresis torque acting between the permanent magnets 18 and the hysteresis materials 20 can be adjusted.

[0070] (Effect of conveyor roller)

[0071] As described above, in the conveying roller 10 of the present embodiment, the roller body 14 can be rotated by utilizing the hysteresis torque acting between the permanent magnet 18 and the hysteresis material 20. In this case, the rotation can be transmitted between the rotating member 16 and the roller body 14 without contacting the permanent magnet 18 and the hysteresis material 20. Thus, deterioration due to wear, which occurs in conventional stacking rollers that transmit rotation by frictional force, does not occur. As a result, the life of the conveying roller can be increased.

[0072] In addition, in a stacking roller having a structure that transmits rotation by friction, the torque acting on the roller body increases before the components that transmit rotation start to slide relative to each other (i.e., before the static friction state changes to the dynamic friction state). As a result, when the conveyance of articles is stopped in the stacking conveyor, there is a case where the self-stopper applies an impact to the articles. In contrast, in the conveying roller 10 of the present embodiment, as described above, since the permanent magnet 18 and the hysteresis material 20 are not in contact, the torque applied to the roller body 14 can be prevented from increasing when the rotating component 16 is idling relative to the roller body 14. Therefore, when the conveyance of articles is stopped in the stacking conveyor 1, the self-stopper can be prevented from applying an impact to the articles.

[0073] In addition, in a stacking roller having a structure that transmits rotation using frictional force, in order to prevent the self-stopper from applying an impact to the article when the transportation of the article is stopped, it is considered to reduce the torque (set value) applied to the roller body from the driving source. However, in this case, when the stacking roller is re-driven, the torque is insufficient and the transportation of the article may be delayed. In this regard, in the conveying roller 10 of the present embodiment, as described above, since the permanent magnet 18 and the hysteresis material 20 are not in contact, it is possible to prevent the torque applied to the roller body 14 from increasing when the transportation of the article is stopped. Therefore, even if the torque (set value) applied to the roller body 14 from the driving source 3 is not reduced, it is possible to prevent the self-stopper from applying an impact to the article when the transportation of the article is stopped. In other words, the self-driving source 3 can give sufficient torque to the roller body 14, and the conveying roller 10 can function appropriately as a stacking roller. As a result, it is possible to prevent the torque from being insufficient when the conveying roller 10 is re-driven, and the article can be smoothly conveyed.

[0074] In the conveying roller 10 of the present embodiment, the mechanism for generating the hysteresis torque (permanent magnet 18 and hysteresis material 20) is provided inside the roller body 14. One end of the roller body 14 is supported by the rotating member 16, and the other end of the roller body 14 is supported by the shaft member 12.

[0075] With such a structure, the permanent magnet 18 and the hysteresis material 20 can be housed in the roller body 14 without being exposed from the roller body 14. This prevents dust and the like generated when conveying articles from adhering to the permanent magnet 18 and the hysteresis material 20. As a result, the conveying roller 10 can function appropriately as a stacking roller.

[0076] In addition, since the permanent magnet 18 and the hysteresis material 20 can be accommodated inside the roller body 14, it is not necessary to arrange the permanent magnet 18 and the hysteresis material 20 in parallel with the roller body 14 in the axial direction. Therefore, the space around the shaft member 12 can be effectively used, and the length of the roller body 14 can be increased. In particular, in the present embodiment, the roller body 14 is provided so as to cover the central portion of the shaft member 12, so that the length of the roller body 14 can be sufficiently increased. As a result, in the roller body 14, the area of ​​the conveying surface for conveying articles can be sufficiently increased, so that the articles can be conveyed stably.

[0077] In addition, in the conveying roller 10 of the present embodiment, as described above, one end of the roller body 14 is supported by the rotating member 16, and the other end of the roller body 14 is supported by the shaft member 12. In this case, it is not necessary to extend the rotating member 16 to the other end of the roller body 14 in the axial direction, so that the axial length of the rotating member 16 can be shortened. As a result, the conveying roller 10 can be made lighter.

[0078] (Other embodiments)

[0079] In the above-mentioned embodiment, the case where the conveying roller 10 has three permanent magnets 18 is described, but the number of permanent magnets 18 provided in the conveying roller 10 may be two or less, or may be four or more. In addition, the hysteresis material 20 is provided in a manner opposite to the permanent magnet 18, so the number of the hysteresis material 20 is also the same as the permanent magnet 18, and may be two or less, or may be four or more.

[0080] exist Figure 1 In the figure, five conveying rollers 10 are shown, but the number of conveying rollers 10 provided in the stacking conveyor 1 (the number of conveying rollers functioning as stacking rollers) may be four or less, or six or more. For example, only one of the plurality of rollers provided in the stacking conveyor 1 may function as a stacking roller. In this case, the other rollers may be free rollers, for example.

[0081] In the above embodiment, the hysteresis material 20 is fixed to the roller body 14 via the fixing member 22 , but the hysteresis material 20 may be directly fixed to the roller body 14 .

[0082] In the above embodiment, the permanent magnet 18 is fixed to the outer peripheral surface of the support portion 62 of the rotating member 16, and the hysteresis material 20 is fixed to the inner peripheral surface of the roller body 14. However, the permanent magnet may be fixed to the inner peripheral surface of the roller body 14, and the hysteresis material may be fixed to the outer peripheral surface of the support portion 62.

[0083] In the above embodiment, the case where the permanent magnet or the hysteresis material is fixed to the outer peripheral surface of the support portion 62 is described, but a cylindrical permanent magnet or hysteresis material may be provided instead of the support portion 62. In this case, the hysteresis material or the permanent magnet may be fixed to the roller body 14 so as to face the permanent magnet or the hysteresis material.

[0084] In the above embodiment, when adjusting the position of the roller body 14 relative to the rotating member 16, the bearing 34 is pressed by the collar 40b. Figure 4 As shown, an elastic member 44 such as an annular spring is provided between the collar 40b and the bearing 34, and the bearing 34 is pressed by the elastic member 44. In this case, the plurality of grooves 64a, the collar 40b, the fastening member 42, and the elastic member 44 function as an adjustment mechanism for adjusting the position of the roller body 14 relative to the rotating member 16 in the axial direction.

[0085] In addition, in the above-mentioned embodiment, the case where the position of the roller body 14 relative to the rotating member 16 is adjusted by changing the position of the groove 64a into which the locking member 38 is inserted is described, but the adjustment structure of the position of the roller body 14 is not limited to the above-mentioned example, and various known structures can be used. For example, a first fixing member (for example, a known positioning ring) may be installed on the adjustment portion 64 instead of the plurality of grooves 64a and the locking member 38 of the adjustment portion 64, and a second fixing member (for example, a known positioning ring) may be installed on the shaft member 12 instead of the collar 40b and the fastening member 42. The first fixing member is configured to be fixed to the adjustment portion 64 at any position in the axial direction, and the second fixing member is configured to be fixed to the shaft member 12 at any position in the axial direction. In this case, the first fixing member and the second fixing member are provided in a manner that the bearings 32 and 34 are clamped from both sides in the axial direction, and the positions of the first fixing member and the second fixing member in the axial direction are adjusted, so that the position of the roller body 14 can be adjusted.

[0086] In the above embodiment, the case where a roller chain is used as the transmission member 4 is described, but the transmission member 4 is not limited to a roller chain. For example, various belts may be used as the transmission member 4. In this case, a pulley portion may be provided as the driven portion instead of the sprocket portion 60.

[0087] In the above embodiment, the case where the rotating members 16 of the plurality of conveying rollers 10 are driven to rotate by one transmission member 4 is described, but it is also possible to use a plurality of transmission members to drive the rotating members 16 of the plurality of conveying rollers 10 to rotate. For example, it is also possible to use one transmission member to drive the rotating member 16 of any one conveying roller 10 from the driving source 3, and use other transmission members to transmit the rotation of the rotating member 16 to the rotating members 16 of other conveying rollers 10.

[0088] Although detailed description is omitted, the driving source and the plurality of rotating members may be configured so that the plurality of rotating members can be rotated by utilizing magnetic attraction or repulsion.

[0089] Industrial Applicability

[0090] According to the present invention, a long-life conveying roller capable of functioning as a stacking roller can be obtained.

[0091] Description of Reference Numerals

[0092] 1. Accumulation conveyor; 10. Conveying roller; 12. Shaft member; 14. Roller body; 16. Rotating member; 18. Permanent magnet; 20. Hysteresis material; 30, 32, 34, 36. Bearing; 60. Sprocket portion; 62. Support portion.

Claims

1. A conveyor roller used in an accumulation conveyor having a driving source, wherein: The conveyor roller has: a cylindrical roller body which is inserted into the columnar shaft member so as to be rotatable relative to the columnar shaft member and to cover the outside of the central portion of the shaft member; a rotating member having a driven portion provided outside the roller body in the axial direction of the shaft member, the rotating member being rotated relative to the shaft member by the shaft member being inserted so as to be rotatable relative to the shaft member and the roller body and the driven portion being driven and rotated by the driving source; a permanent magnet provided inside the roller body and fixed to one of the rotating member and the roller body; as well as A hysteresis material is fixed to the other of the rotating member and the roller body so as to face the permanent magnet in a radial direction of the roller body and be separated from the permanent magnet, and a hysteresis torque is generated between the hysteresis material and the permanent magnet.

2. The conveying roller according to claim 1, wherein: The rotating member has a cylindrical support portion, at least a portion of which is located inside the roller body, and the support portion rotates integrally with the driven portion with the shaft member as a rotation center. The permanent magnet is fixed to one of the outer peripheral surface of the support portion and the inner peripheral surface of the roller body. The hysteresis material is fixed to the other of the outer peripheral surface and the inner peripheral surface.

3. The conveying roller according to claim 2, wherein: The conveyor roller also has: a first bearing supported by the support portion and supporting the roller body so that the roller body can rotate relative to the rotating member; and The second bearing is supported by the shaft member and supports the roller body so that the roller body is rotatable relative to the shaft member.

4. The conveying roller according to claim 3, wherein: The first bearing is supported by the rotating member so as to be movable in the axial direction relative to the rotating member. The second bearing is supported by the shaft member so as to be movable in the axial direction relative to the shaft member.

5. The conveying roller according to any one of claims 1 to 4, wherein The transport roller further includes an adjustment mechanism that adjusts a position of the roller body relative to the rotating member in the axial direction.

6. The conveying roller according to any one of claims 1 to 4, wherein: The permanent magnet has a cylindrical shape and has a structure in which different poles are magnetized alternately in a circumferential direction.

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