JP2009203043A - Roller conveyor facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller conveyor facility capable of manufacturing a roller easily in a short time and achieving weight saving, while smoothing the surface of an annular groove section, where an endless rotating body is wrapped therearound. <P>SOLUTION: In this roller conveyor facility, a rotary drive shaft 20 along the direction of a conveyance path is provided below a roller 10 group arranged in a conveyor frame 3 in a freely rotating manner, the rotary drive shaft and at least a part of the roller are interlockingly connected via the endless rotating body 25, and a rotary drive section 30 is interlockingly connected with the rotary drive shaft. At least a part of the roller 10 is formed of a metal cylindrical body section 11, resin end members 12, 13 inserted and connected at both end sections of the cylindrical body section, and rotating shaft bodies 14, 15, respectively provided in the center sections of the end members. A part of one-end member 12 is protruded from the cylindrical body section, and the annular groove section 12E, where the endless rotating body 25 is wrapped therearound, is integrally formed in a protruded section 12Z. The outside protruded sections of the rotating shaft bodies 14, 15 are supported in the conveyer frame 3, in a freely rotating manner via a bearing 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a roller conveyor facility employed for supporting and transporting an object to be transported, for example.

  Conventionally, the following configuration is provided as this type. That is, the conveying roller and the driving transmission sheave are coaxially disposed at a plurality of locations of the frame via the shaft body, and the clutch bodies that are in surface contact with each other on the joint surface between the conveying roller and the driving transmission sheave. A drive shaft is disposed along the conveyance direction below the conveyance roller group. The drive shaft and the drive transmission sheave at predetermined intervals are interlocked and connected via a drive shaft sheave and a transmission belt, and adjacent drive transmission sheaves are interlocked and connected via an interlock belt. At this time, the drive transmission sheave is formed in a cylindrical surface having a recess in the central region of the outer peripheral surface, and an interlocking belt is twisted between the recess and the drive shaft sheave. Thus, the rotation of the drive shaft is transmitted to the drive shaft sheave, the transmission belt, the drive transmission sheave, the clutch body, and the conveyance roller, and the conveyance roller group is rotated via the interlocking belt (see, for example, Patent Document 1). ).

As another configuration, a belt hooking groove is formed by recessing the outer periphery of the roller in an annular shape (see, for example, Patent Document 4).
JP 2003-81415 A (page 4-5, FIGS. 1 to 4) JP 2003-292139 A JP 2003-292144 A JP 2002-154626 A (page 3, FIG. 5)

  However, according to the above-described conventional configuration, since the drive transmission sheave in Patent Document 1 and the roller in Patent Document 2 are made of metal, the formation of the recessed portion and the belt-hanging groove cannot be easily performed. Is expensive. Further, the shaft and the roller shaft are made to pass through a single one, so that the roller becomes heavy. Furthermore, the surface of the recess and the belt-hanging groove is rough, so that a moving belt that is hung in a twisted shape is easily worn out, which causes short durability.

  SUMMARY OF THE INVENTION Accordingly, the invention according to claim 1 of the present invention provides a roller conveyor facility that can make a roller easily in a short time, reduce the weight, and can smooth the surface of an annular groove on which an endless rotating body is hung. It is aimed at.

  In order to achieve the above-described object, the roller conveyor facility according to claim 1 of the present invention is configured such that rollers are freely arranged between a pair of left and right conveyor frames at a plurality of locations in the direction of the conveyance path, A rotary drive shaft is provided below the roller group along the direction of the conveyance path, and the rotary drive shaft and at least a part of the rollers are linked to each other via an endless rotating body and linked to the rotary drive shaft. A roller conveyor facility provided with a rotating drive unit to be connected, wherein at least some of the rollers are made of a metal cylindrical main body part, and an end member made of resin inserted and joined to both end portions of the cylindrical main body part And a shaft for rotation provided at the center of each of the end members. One end member projects from the cylindrical main body, and an endless rotating body is hung on the projecting portion. Ring Parts are integrally molded, the outer projecting portion conveyor frame of the rotating shaft body, in which is characterized in that is supported freely idle through the bearings.

  Therefore, according to the first aspect of the present invention, the rotation drive shaft is rotated by the drive rotation of the rotation drive unit, and the rotation of the rotation drive shaft is transmitted to the one end member portion via the endless rotating body, thereby the roller. The object to be transported supported by the roller group can be transported on the transport path. At that time, the resin end member of the roller can be manufactured by injection molding or the like, and the rotating shaft body can be integrated by insert molding at the time of injection molding, and two short rotating shaft bodies may be used. The weight can be reduced. Further, the surface of the annular groove portion formed by resin molding can be made smooth, so that the endless rotating body that is hung in a twisted shape is hardly worn.

  The roller conveyor facility according to claim 2 of the present invention is characterized in that, in the configuration according to claim 1, the annular groove is integrally formed with an arc-shaped cross section, and the endless rotating body is composed of an endless round belt. It is.

  Therefore, according to the second aspect of the present invention, the endless round belt that is twisted is more difficult to wear because the circular end surface of the endless belt contacts the circular arc surface of the annular groove. Become.

  And the roller conveyor equipment according to claim 3 of the present invention is the sliding bearing according to claim 1 or 2, wherein the bearing can be fitted from the axial direction to the outer projecting portion of the rotating shaft. These slide bearings are dropped into U-grooves formed in the conveyor frame, so that rollers are freely arranged between the conveyor frames.

  Therefore, according to the third aspect of the present invention, the roller can be easily assembled, and the slide bearing can be disposed without rattling, and the endless rotating body can be stably hooked (wound).

  Furthermore, the roller conveyor equipment according to claim 4 of the present invention is the configuration according to any one of claims 1 to 3, wherein the protruding portion of one end member has an annular shape at a plurality of positions in the axial direction. A groove portion is formed and linked to a rotational drive shaft via an endless rotating body hung on one annular groove portion, and linked to an adjacent roller via an endless rotating body hung on the remaining annular groove portion. It is a feature.

  Therefore, according to the fourth aspect of the present invention, the roller at the place where the rotation drive unit is provided can be driven and rotated integrally with the adjacent roller via the endless rotating body, and all the rollers can be driven and rotated.

  And the roller conveyor installation of Claim 5 of this invention is a structure of any one of said Claims 1-4, All the rollers are metal cylindrical main-body parts, and this cylindrical main body. It consists of an end member made of resin inserted and joined to both ends of the part, and a rotating shaft provided at the center of these end members, and an annular groove formed integrally with the protruding part of one end member and rotated An endless rotating body is hung between the drive shaft and the drive shaft.

  Therefore, according to the fifth aspect of the present invention, the rotation of the rotary drive shaft can be transmitted to one end member portion via the endless rotating body to drive and rotate all the rollers.

  According to the first aspect of the present invention, the rotation drive shaft is rotated by the drive rotation of the rotation drive unit, and the rotation of the rotation drive shaft can be transmitted to the one end member through the endless rotating body. Then, the object to be conveyed supported by the roller group can be conveyed on the conveying path by driving and rotating the roller. At that time, the end member made of resin in the roller can be easily manufactured in a short time by injection molding or the like, and the shaft for rotation can be easily and firmly integrated by insert molding at the time of injection molding. It can be manufactured at low cost, and can be reduced in weight because two short rotating shafts are sufficient. Further, the surface of the annular groove formed by resin can be made smooth, so that the endless rotating body that is twisted can be improved in durability, such as being hard to wear.

  According to the second aspect of the present invention described above, the endless round belt to be twisted is more worn by the contact of the circular end surface of the endless round belt with the circular arc surface of the annular groove. It can be made difficult to improve durability.

  According to the third aspect of the present invention described above, the roller can be easily assembled, and the slide bearing can be arranged without backlash, and the endless rotating body can be stably hooked (wrapped). , Noise in the roller part can be reduced.

  According to the fourth aspect of the present invention described above, the roller at the location where the rotation drive unit is provided can be driven and rotated integrally with the adjacent roller via the endless rotating body, so that all the rollers can be stabilized. Can be driven and rotated.

  Moreover, according to the fifth aspect of the present invention described above, the rotation of the rotary drive shaft can be transmitted to one end member portion via the endless rotating body to drive and rotate all the rollers.

[Embodiment 1]
Below, Embodiment 1 of this invention is demonstrated based on a figure as a state which employ | adopted the several linear roller conveyor apparatus.

  2 to 4, a frame main body 2 of a linear roller conveyor device (an example of roller conveyor equipment) 1 is connected between a pair of left and right linear conveyor frames 3 and the lower portions of both conveyor frames 3. A leg member 5 is detachably connected between a lower portion of the conveyor frame 3 and a plurality of positions in the length direction. Between the two conveyor frames 3, rollers 10 are provided so as to be freely rotatable at a plurality of locations in the length direction (conveyance path direction), thereby forming a linear conveyance path 8 above the group of rollers 10. Is done.

  In FIGS. 1 and 5 to 9, all (at least a part) of the rollers 10 are made of a metal cylindrical main body 11 and a resin-made press-fitted joint between both ends of the cylindrical main body 11. It consists of end members 12 and 13 and rotating shafts 14 and 15 provided at the center of these end members 12 and 13, respectively. Here, one end member 12 partially protrudes from the cylindrical main body portion 11 (about half), and has an endless rotating body (to be described later) at two positions (a plurality of positions) in the axial direction of the protruding portion 12Z. .) Is formed integrally with the annular grooves 12E and 12F. Further, the other end member 13 is inserted into the end portion of the cylindrical main body 11 almost in the entire length.

  That is, one end member 12 is surrounded between the outer cylinder part 12A, the inner cylinder part 12B, the porous disk part 12C positioned between the outer ends of the two cylinder parts 12A and 12B, and the two cylinder parts 12A and 12B. It consists of connection reinforcing portions 12D radially located at six locations (a plurality of locations) in the direction, and the shaft 14 for rotation is insert-molded, and the circular grooves 12E and 12F having arc-shaped cross sections are integrally molded. Obtained by molding. At that time, the rotation shaft body 14 has a length protruding from the end member 12 at both ends, and a knurled portion 14a is formed at the center in the length direction, so that the inner cylindrical portion 12B in insert molding is formed. The bond with is considered to be strong.

  Further, one end member 12 is integrally formed with an outer step portion 12G at the center portion in the length direction on the outer surface of the outer cylindrical portion 12A, and is press-fitted into the end portion of the cylindrical main body portion 11 by insertion. When this is done, the projecting portion 12Z in which the annular groove portions 12E and 12F are integrally formed is projected from the cylindrical body portion 11 by a predetermined amount by bringing the step portion 12G into contact with the end surface of the cylindrical body portion 11. It is configured. At this time, the press-fitting of the end member 12 to the end portion of the cylindrical main body portion 11 is firmly performed in a state that resists the resin elastic force of the outer cylindrical portion 12A and the connection reinforcing portion 12D group. One end member 12 has an inclined surface 12H for insertion guide on the outer surface at the inner end portion of the outer cylindrical portion 12A.

  The other end member 13 includes an outer cylindrical portion 13A, an inner cylindrical portion 13B, a disk portion 13C positioned between the outer ends of both cylindrical portions 13A and 13B, and a circumferential direction between both cylindrical portions 13A and 13B. It consists of the connection reinforcement part 13D located radially by six places (plural places), and is obtained by injection molding in the state which insert-molds the shaft 15 for rotation. At that time, the rotating shaft 15 has a length protruding from the end member 13 at both ends, and a knurled portion 15a is formed at the center in the length direction, so that the inner cylindrical portion 13B in insert molding is formed. The bond with is considered to be strong.

  Further, the other end member 13 is integrally formed with an outer step portion 13G on the outer end portion in the length direction on the outer surface of the outer cylindrical portion 13A, and is press-fitted into the end portion of the cylindrical main body portion 11 by insertion. At the time of coupling, the step portion 13G is brought into contact with the end surface of the cylindrical main body portion 11 so that the substantially entire length is inserted into the end portion of the cylindrical main body portion 11. At this time, the press-fitting of the end member 13 to the end portion of the cylindrical main body portion 11 is firmly performed in a state that resists the resin elastic force of the outer cylindrical portion 13A and the connection reinforcing portion 13D group. The other end member 13 has an inclined surface 13H for insertion guide on the outer surface at the inner end portion of the outer cylindrical portion 13A. An example of the roller 10 is configured by the above 11-15.

  The roller 10 configured in this manner is supported on the conveyor frame 3 so as to be freely rotatable via a sliding bearing (an example of a bearing) 18 on the outer protruding portions of the rotating shafts 14 and 15. That is, in the plain bearing 18, a perfectly circular hole portion 18C having an open inner end is formed by the hexagonal cylindrical portion 18A and the disc portion 18B positioned at the outer end of the hexagonal cylindrical portion 18A. . A cut surface 18D is formed at each corner of the hexagonal cylindrical portion 18A from the outer end to the intermediate portion, and an outward stopper surface 18E is formed at the intermediate portion by an uncut end surface. Yes. An oil supply port 18F that communicates with the hexagonal cylindrical portion 18A is formed at a location inside the stopper surface 18E of the hexagonal cylindrical portion 18A.

  At this time, the inner diameter of the perfectly circular hole 18C is formed to be slightly larger than the outer diameter of the outer projecting portion of the rotating shafts 14 and 15, and therefore the sliding bearing 18 is provided with the rotating shafts 14 and 15. The outer projecting portions of the rotating shaft bodies 14 and 15 and the sliding bearings 18 are relatively slidably rotatable (slidable and rotatable). ). The sliding bearing 18 is dropped into a U groove formed in the conveyor frame 3, so that the roller 10 is disposed between the conveyor frames 3 so as to be freely rotatable.

  That is, the conveyor frame 3 is formed of a C-shaped rail body (reverse C-shaped rail body), and a cut U-groove 6 is formed in the upper corner portion formed by the upper plate portion and the side plate portion in the direction of the conveyance path 8. A plurality are formed at predetermined pitch intervals. Then, the sliding bearing 18 is dropped into the U groove 6 with the oil supply port 18F facing upward, whereby the pair of cut surfaces 18D are slidably guided to the side surfaces of the U groove 6, and the outward stopper surface 18E is provided on the side plate. The roller 10 is arranged so as to be freely rotatable via a pair of sliding bearings 18 between the conveyor frames 3.

  1 to 6, a rotary drive shaft 20 is provided below the roller 10 group along the direction of the conveyance path 8, and both ends of the rotary drive shaft 20 are provided on the frame body 2 side. A bearing 21 is rotatably supported. Here, the rotational drive shaft 20 has the same length as the conveyor frame 3, and a coupling body 22 such as a coupling is provided at each end thereof. The rotary drive shaft 20 and the roller 10 are interlocked and connected via an endless round belt (an example of an endless rotating body) 25. In other words, a transmission wheel body (V pulley) 23 is externally fitted and fixed to the rotary drive shaft 20 at a position facing the inner annular groove portion 12E of each roller 10 from below. An endless round belt 25 is twisted between the (one) annular groove 12E.

  A rotation drive unit 30 is provided for interlocking connection with the rotation drive shaft 20. That is, on the lower surface of the frame main body 2 side, a rotary drive unit 30 including a motor, a speed reducer, and the like is detachably provided via a coupling tool (bolt / nut, etc.) 36. The output shaft 31 of the rotation drive unit 30 and the rotation drive shaft 20 are interlocked and connected via a winding interlocking mechanism 32. Here, the winding interlocking mechanism 32 includes a ring body (sprocket or the like) 33, 34 attached to the output shaft 31 and the rotary drive shaft 20, and an endless rotating body (chain or the like) 35 wound between the both wheel bodies 33, 34. It consists of.

  It should be noted that in places where the winding interlock mechanism 32 and the like are provided, the transmission wheel body 23 cannot be externally fixed to the rotary drive shaft 20, and the roller 10 at this location is directly driven by the rotary drive shaft 20. Can not. At this time, an endless round belt (an example of an endless rotating body) 26 is hung between the outer annular groove portion 12F of the roller 10 and the outer (remaining) annular groove portion 12F of the adjacent roller 10. The roller 10 at the location is interlocked with the adjacent roller 10.

  A plurality of linear roller conveyor devices 1 configured as described above are disposed in the direction of the linear conveying path 8 (three are disposed), and the opposing end portions of the rotary drive shaft 20 are connected to each other. ing. That is, the opposing ends of the conveyor frame 3 are connected by connecting means 40 made of a backing plate, bolts, nuts, and the like, and the opposed connecting bodies 22 are connected by a connector (bolts, nuts, etc.) 41. Yes. Then, by setting the rotation drive unit 30 or the like on one of the linear roller conveyor devices 1 group as described above, one rotation drive unit 30 drives a plurality of (three) rotation drive shafts 20. It is configured as follows.

Hereinafter, the operation in the first embodiment will be described.
At the installation site, three (a plurality of) roller conveyor devices 1 are arranged in the direction of the linear conveyance path 8, and the opposite ends of the conveyor frame 3 are connected by the connecting means 40, and the rotational drive shaft The connecting tool 41 connects between the 20 opposing end portions, that is, between the connecting bodies 22 facing each other. Before and after this, in one linear conveyor unit 1, the rotation drive unit 30 is connected to the frame body 2 side by the connecting tool 36, and the output shaft 31 and the rotation drive shaft 20 of the rotation drive unit 30 are wound around each other. The interlocking mechanism 32 is interlocked and connected. As described above, the roller conveyor equipment in which the three linear roller conveyor devices 1 are connected so that each linear conveying path 8 is in a straight line and the three rotary drive shafts 20 are driven by one rotary drive unit 30. Can be configured.

  The transported object (folding container, container, cardboard box, etc.) by the roller conveyor equipment configured as described above is transported as follows. That is, by driving the rotation drive unit 30, the drive rotation of the output shaft 31 can be transmitted to the rotation drive shaft 20 via the winding interlocking mechanism 32, and the connected rotation drive shafts 20 group can be transmitted. Rotate together. The rotation of the rotation drive shaft 20 in each roller conveyor device 1 is transmitted to the portion of the one end member 12 via the transmission wheel body 23 and the endless round belt 25, so that the roller 10 group can be driven and rotated. It should be noted that the roller 10 where the winding interlocking mechanism 32 and the like are provided can be driven and rotated integrally with the adjacent roller 10 via the endless round belt 26.

  In other words, the rotation drive shaft 20 group is integrally rotated via the winding interlock mechanism 32 by driving one rotation drive unit 30, and in each roller conveyor device 1, the rollers 10 are connected via endless round belts 25 and 26. The group can be driven and rotated, so that the object to be conveyed supported by the group of rollers 10 can be conveyed on each linear conveyance path 8 made straight. As a result, three (a plurality of) roller conveyor devices 1 can be connected and driven by a single rotation drive unit 30, so that a roller conveyor facility with a long (arbitrary length) linear conveyance path can be provided. It can be realized at low cost (cost reduction).

  At that time, the roller 10 is made of a metal cylindrical main body 11, resin end members 12, 13 inserted and coupled to both end portions of the cylindrical main body 11, and the central portions of these end members 12, 13. And one end member 12 protrudes from the cylindrical main body 11 and endless round belts 25 and 26 are hung on the protruding portion 12Z. Since the annular grooves 12E and 12F having an arcuate cross section are integrally formed, the resin end members 12 and 13 can be easily manufactured in a short time by injection molding or the like, and the rotating shafts 14 and 15 are formed at the time of injection molding. The roller 10 can be easily and firmly integrated by insert molding, so that the roller 10 can be manufactured at low cost, and the weight can be reduced because the two short rotating shafts 14 and 15 are sufficient.

  Further, the surfaces of the annular grooves 12E and 12F formed by resin can be made smooth, and thus the endless round belt 25 that is hung in a twisted shape can be improved in durability, such as being hardly worn. Moreover, the endless round belt 25 that is hung in a twisted manner can be made more difficult to wear by contacting the surface of the endless round belt 25 with the circular cross section of the circular groove 12E.

  Further, the bearing is composed of a sliding bearing 18 that can be fitted from the axial direction with respect to the outer projecting portions of the rotating shaft bodies 14 and 15, and the sliding bearing 18 is dropped into the U groove 6 formed in the conveyor frame 3. Since the roller 10 can be freely arranged between the conveyor frames 3, the roller 10 can be easily assembled, and the slide bearing 18 can be provided with no backlash, and the endless round belt 25. Can be stably hooked (wound), so that noise at the roller 10 portion can be reduced.

  In addition, among the annular grooves 12E and 12F formed at a plurality of locations, the endless round belt 25 is interlocked and connected to the rotary drive shaft 20 via an endless round belt 25 hung on one annular groove 12E, and hung on the remaining annular groove 12F. As a result, the rollers 10 can be driven and rotated stably.

  In the above-described first embodiment, the end members 12 and 13 are press-fitted to the end portion of the cylindrical main body portion 11 in a state in which the outer cylindrical portions 12A and 13A and the connection reinforcing portions 12D and 13D groups resist the resin elastic force. Although the form to be performed is shown, this may be a form in which it is inserted and bonded with an adhesive.

  In the first embodiment described above, a form using the endless round belts 25 and 26 as the endless rotating body is shown, but this is a form using an endless V belt or an endless flat belt as the endless rotating body. In these cases, the shapes of the annular groove and the transmission wheel body 23 are considered.

  In the first embodiment described above, a form of driving all the rollers 10 is shown, but this may be a form in which the rollers are driven in a flying manner, for example, every other roller or every other roller.

  In the first embodiment described above, there is shown a type in which the sliding bearing 18 fitted on the outer projecting portion of the rotating shaft 14 is dropped into the U groove 6 formed in the conveyor frame 3. A form in which the (rolling ball bearing) is fixed (fixed) to the conveyor frame 3 may be used.

  In the first embodiment described above, a form in which the knurled portions 14a and 15a are formed in the central portions of the rotating shafts 14 and 15 and the coupling with the inner cylindrical portion 12B in the insert molding is strengthened is shown. However, this may be a form in which the bonding is strengthened by holding by adhesion.

  In the first embodiment described above, a form in which the annular groove portions 12E and 12F are formed at two places (a plurality of places) in the axial direction in the protruding portion 12Z of the one end member 12 is shown. (Single place) or a form in which an annular groove is formed at three or more places (plural places) may be used.

  In the first embodiment described above, a form in which a plurality of linear roller conveyor devices 1 are arranged is shown. This is a form in which a single linear roller conveyor device 1 is arranged, or a linear roller conveyor device. The form etc. which combined 1 and the curved roller conveyor apparatus may be sufficient.

BRIEF DESCRIPTION OF THE DRAWINGS It is Embodiment 1 of this invention, and is a partially notched front view of the principal part of roller conveyor equipment. It is a partially cutaway top view of the roller conveyor equipment. It is a schematic plan view of the roller conveyor equipment. It is a partially cutaway side view of the roller conveyor facility. It is a partially cutaway top view of the principal part of the roller conveyor equipment. It is a partially cutaway side view of the principal part of the roller conveyor equipment. It is a side view of the roller part in the roller conveyor installation. It is a vertical side view of the roller part in the roller conveyor equipment. It is a partially cutaway perspective view of one end member and a slide bearing in the roller conveyor facility.

Explanation of symbols

1 Roller conveyor equipment (roller conveyor equipment)
2 Frame body 3 Conveyor frame 6 U-groove 8 Transport path 10 Roller 11 Tubular body 12 One end member (end member)
12A Outer cylinder part 12B Inner cylinder part 12E Annular groove part 12F Annular groove part 12G Step part 12Z Projection part 13 The other end member (end member)
13A Outer cylinder part 13B Inner cylinder part 13G Step part 14 Rotating shaft 14a Knurled part 15 Rotating shaft 15a Knurled part 18 Sliding bearing (bearing)
18A Hexagonal cylindrical portion 18C Round hole 18E Stopper surface 20 Rotation drive shaft 23 Transmission wheel 25 Endless round belt (endless rotating body)
26 Endless round belt (endless rotating body)
30 Rotation drive part 32 Winding interlocking mechanism

Claims (5)

  Between the pair of left and right conveyor frames, rollers are freely disposed at a plurality of locations in the direction of the conveyance path, and a rotary drive shaft is provided below the roller group along the direction of the conveyance path. The drive shaft and at least a part of the rollers are linked and connected via an endless rotating body, and are provided with a rotary drive unit that is linked and connected to the rotary drive shaft. A cylindrical body portion made of metal, a resin end member inserted into and coupled to both end portions of the cylindrical body portion, and a rotating shaft provided at the center of each end member, A part of the end member protrudes from the cylindrical main body portion, and an annular groove portion on which the endless rotating body is hung is integrally formed on the protruding portion, and the outer protruding portion of the rotating shaft body is attached to the conveyor frame. Roller conveyor equipment, characterized by being supported freely idle through.   2. The roller conveyor equipment according to claim 1, wherein the annular groove is integrally formed with an arc-shaped cross section, and the endless rotating body is formed of an endless round belt.   The bearings are sliding bearings that can be fitted from the axial direction to the outer projecting portion of the rotating shaft body, and these sliding bearings are dropped into U-grooves formed in the conveyor frame, so The roller conveyor system according to claim 1 or 2, wherein the rollers are arranged so as to be freely rotatable.   An annular groove is formed at a plurality of locations in the axial direction on the protruding portion of one end member, and is linked to the rotary drive shaft via an endless rotating body that is hung on one annular groove, and is hung on the remaining annular grooves. The roller conveyor equipment according to any one of claims 1 to 3, wherein the roller conveyor equipment is interlocked and connected to adjacent rollers via an endless rotating body.   All the rollers are made of a metal cylindrical main body, a resin end member inserted into and coupled to both end portions of the cylindrical main body, and a rotating shaft provided at the center of these end members. The endless rotating body is hung between the annular groove formed integrally with the projecting portion of the one end member and the rotation drive shaft, according to any one of claims 1 to 4. Roller conveyor equipment.

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