JP6364276B2 - Belt curve conveyor equipment - Google Patents

Description

  The present invention relates to a belt curve conveyor device used for changing the conveyance direction of a conveyed product. In particular, the present invention relates to a belt curve conveyor device that is provided to change the conveyance direction of a light and small conveyance object and has a small diameter head and tail pulley for transfer to an upstream / downstream conveyor.

  As a method of transporting a light transported object or a heavy transported object, it is common to transport the transported object using a plurality of belt conveyor devices arranged along the transport path of the transported object. As one of such belt conveyor devices, there is a belt curve conveyor device for changing the conveyance direction of a conveyed product. The belt curve conveyor device is a device in which an endless sector belt is wound around two end pulleys (a head pulley and a tail pulley) pivotally supported by a device frame with an opening angle of 90 degrees, for example. In particular, in order to change the conveyance direction of a light and small conveyed product, the two end pulleys need to have a small diameter for the transfer to the upstream and downstream conveyors. When the fan-shaped belt is driven by driving such a belt curve conveyor device, the peripheral speed on the inner diameter side and the peripheral speed on the outer diameter side are different from each other. In many cases, the tail pulley is driven and a pulley having a short straight outer cylinder, which is externally fitted to the central shaft and arranged in parallel, is rotatably provided.

  Further, in the belt curve conveyor device, the two end pulleys are arranged with a predetermined opening angle such as 90 degrees, for example, and therefore the tension toward the main side of the fan belt, that is, the inner diameter side (inner diameter direction) Tension) is inevitably generated. Therefore, when the belt-shaped conveyor device is driven with a drive device provided in the middle to drive the fan belt, the fan belt is displaced in the inner diameter direction by the tension in the inner diameter direction applied to the fan belt, and the head pulley and tail pulley are both of the fan belt. The endless belt surrounded by the forward side and the return side comes out, and the end pulley and the rear surface of the sector belt are completely slipped.

  In order to solve such problems, for example, a timing belt is affixed to the back surface of the outer diameter side end (outer peripheral edge) of the fan belt, and a sprocket is provided on the fan belt outer diameter portion of the head pulley to drive the timing belt. However, the bed pulley and tail pulley are driven, and there is a technology in which a short pulley with a straight outer cylinder, which is externally fitted to the central shaft and arranged in parallel, is rotatably attached to the back surface of the outer diameter side end of the sector belt. Tightening elements for tightening the shoulder of the attached timing belt from the back surface toward the outer diameter direction of the sector belt (idling roller that abuts on the surface of the sector belt, and tightening roller that abuts the shoulder of the timing belt on the back of the sector belt) Place a plurality of fan belts at predetermined angular intervals and pull the fan belt in the outer diameter direction, which is the opposite direction to the inner diameter direction. In the curve belt conveyor device for preventing displacement in the inner diameter direction of the fan belt it has been proposed (see Patent Document 1). In addition to this, a toothed tooth that rotates endlessly between the outer peripheral edge of the belt portion on the forward side of the fan-shaped belt and the outer peripheral edge of the belt portion on the return side and covers a plurality of blocks in which magnets are embedded in the outer peripheral portion. A driving rotary member having a belt, and a driven rotary member having a toothed belt that is endlessly rotated on the outer side of the fan belt and on the outer side of the return belt and is covered with a plurality of blocks having magnets embedded in the outer peripheral portion. When the drive rotation member is driven by the drive mechanism, the block magnet covered by the toothed belt of the driven rotation member is attracted by the drive magnet of the block covered by the toothed belt of the drive rotation member. Thus, a curved belt conveyor device has been devised that prevents the fan belt from shifting in the inner diameter direction by running the fan belt while sandwiching the fan belt (Patent Document 2). Irradiation).

Special table 2011-520726 gazette JP 2007-106595 A

  However, in the belt curve conveyor device disclosed in Patent Document 1, since the end pulleys in which a plurality of small pulleys are arranged in parallel are arranged so that the peripheral surface of each small pulley comes into contact with the back surface of the sector belt, When the small pulley rotates, the fan belt is worn by the edge of the small pulley, and the fan belt is easily damaged. In addition, a plurality of fastening elements for fastening the outer peripheral edge of the sector belt are used as a mechanism for preventing the sector belt from being displaced in the inner diameter direction, but if the accuracy of the assembly position of these fastening elements is poor, the outside of the sector belt is removed. Since the peripheral edge is easily damaged, it is accompanied by skill when assembling the tightening element. The belt curve conveyor device disclosed in Patent Document 2 does not need to be provided with the fastening element disclosed in Patent Document 1, but the structure of the rotation mechanism is complicated, and the drive rotation member constituting the rotation mechanism In addition, there is a problem that the position adjustment of the driven rotating member is accompanied by skill. Further, in the case of a curved belt conveyor device using such a rotation mechanism, the traveling direction of the toothed belt when the driving rotating member or the driven rotating member rotates is linear, whereas the traveling of the fan belt is performed. Since the direction is the circumferential direction, the surface of the sector belt and the edge of the toothed belt of the driven rotating member are easily rubbed, and the surface of the sector belt is worn. For example, when food or cosmetics is transported as a lightweight transported object, the abrasion of the surface of the sector belt is not preferable in terms of management and hygiene. Therefore, since it becomes necessary to frequently replace the sector belt, the cost of the belt curve conveyor device itself increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a belt curve conveyor device that can prevent a fan belt from being damaged by running the fan belt stably. In particular, it is an object of the present invention to provide a belt curve conveyor device that is provided to change the conveyance direction of a light and small conveyed object and that has a small diameter tail and tail pulley for transfer to an upstream and downstream conveyor.

  In order to solve the above-described problems, the belt curve conveyor device of the present invention is composed of an endless fan-shaped belt having an edge protruding from the surface in a substantially semicircular cross section near the outer periphery as a peripheral edge, and a taper roller. A head pulley driven by a motor and a taper roller having the same angle as the taper angle of the head pulley, and a tail pulley that is driven in accordance with the rotation of the head pulley, and the head pulley and the tail pulley are opened to a predetermined extent. A device frame that pivots in an inclined state so that the upper surface of the sector belt wound around the head pulley and the tail pulley is a horizontal surface at an angle, and along the vicinity of the outer peripheral edge of the sector belt The fan-shaped base provided on the device frame and wound around the head pulley and the tail pulley. A plurality of guide wheel units for pulling the fan belt in the direction from the main part of the fan belt to the outer periphery by sandwiching the outer peripheral edge of the fan from the front side and the back side, and the main side of the fan belt on the device frame, A bed on which the fan-shaped belt is placed by being supported horizontally with respect to the device frame by fixing the outer peripheral side of the fan-shaped belt to the device frame from the gaps of the plurality of guide wheel units using a support member. And a pressing pulley that is disposed below the head pulley and presses the fan belt wound around the head pulley toward the head pulley, and the pressing pulley has a taper angle of the head pulley. The length of the tapered outer cylinder in the rotation axis direction is the same angle and the tapered outer cylinder of the head pulley has the same angle. A taper roller set to be shorter than a length in a rotation axis direction, wherein the pressing pulley has a large-diameter side end portion of the tapered outer cylinder located in the vicinity of an outer peripheral edge portion of the sector belt, and a circumference of the tapered outer cylinder. The surface is inclined so as to press a portion near the outer periphery of the length from the main part of the sector belt wound around the head pulley to the outer peripheral edge toward the peripheral surface of the tapered outer cylinder of the head pulley. By being arranged in a state, it is possible to prevent sliding with the back surface of the sector belt that occurs when the head pulley rotates.

  Further, the guide wheel unit includes a first guide wheel with which the back surfaces of the outer peripheral edge portions of the forward and return belt portions of the sector belt wound around the head pulley and the tail pulley are respectively contacted, When the lower end of the apparatus frame is fastened, a first holding member that holds the first guide wheel rotatably around a horizontal axis at a portion that rises vertically, and a forward side of the fan-shaped belt In a state in which the second guide wheel abutted from the main side of the sector belt on the raised portion protruding to the front side of the outer peripheral edge portion of the belt portion and the second guide wheel are rotatably supported. A second holding member fixed to the upper end portion of the holding member, and a protruding portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt, on the main side of the sector belt. A portion where the lower end portion of the first holding member of the device frame is located on the main side of the sector belt in a state where the third guide wheel to be contacted and the third guide wheel are rotatably supported. A third holding member that is fixed to the second guide wheel, the guide wheel unit being pressed by a protruding portion protruding to the front side of the outer peripheral edge of the forward belt portion. The variation of the pressing force due to the change in the position of the raised portion is absorbed by bending the vertically rising portion of the first holding member.

  In this case, the guide wheel unit optimizes the pressing force to the third guide wheel that is pressed by the raised portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt. After the lower end portion of the third holding member is weakly fastened to the device frame at a portion of the device frame that is located on the main side of the belt portion of the sector belt, the fan belt is driven in advance. Then, after the third guide wheel is in a position where it does not bite into the protruding portion protruding to the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt, the lower end portion of the third holding member is moved to the device. It is preferable to fasten and fix to the frame.

  Further, the first guide wheel pulls the sector belt in the outer circumferential direction of the sector belt while preventing the outer peripheral edge of the belt portion on the forward side of the sector belt from falling off with the second guide wheel, And a first position for pulling the sector belt in the outer circumferential direction of the sector belt while preventing the outer peripheral edge of the belt portion on the return side of the sector belt from falling off with the third guide wheel, and the first position. Can be slid between a second position that is located radially outside the sector belt and from which the sector belt can be attached and detached, and the guide wheel unit includes the first guide wheel A collar is externally fitted at a position radially outside the fan-shaped belt of the first guide wheel, and is freely slidable in the shaft fitting hole of the first holding member. The first guide wheel is pivotally supported by the first holding member, and the guide wheel unit is brought into contact with the first holding member when the first guide wheel is in the first position. A plate attached to the rotation shaft of the first guide wheel that moves to a position separated from the first holding member when the first guide wheel slides from the first position to the second position. And a fastening member that fastens the plate-like member in contact with the first holding member to the first holding member and holds the first guide wheel in the first position. It is characterized by having.

  In this case, the fastening member has a locking portion that is inserted into an insertion hole provided in the first holding member when the first guide wheel moves from the second position to the first position. A tubular member and the tubular member being pushed into the tubular member to push the engaging portion of the tubular member outward in the radial direction of the tubular member, and the engaging portion of the tubular member is inserted into the insertion hole And a pressing member to be engaged with the head.

  Further, the first guide wheel, the second guide wheel, and the third guide wheel are rolling bearings in which a central shaft is fitted to an inner ring and a portion that slides on the sector belt is an outer ring. It is characterized by. Further, the first guide wheel is at least two or more rolling bearings arranged in parallel, wherein a central axis is fitted to an inner ring, and a portion sliding with the fan belt is an outer ring. .

  Further, a small diameter side end of the tapered pulley in the tapered outer cylinder, a small diameter side end of the tapered outer cylinder of the head pulley, and a small diameter side end of the tail pulley of the tapered outer cylinder are spherical bearings. It is supported by a shaft.

  According to the present invention, the holding pulley disposed below the head pulley has the same angle as the taper angle of the head pulley, and the taper outer cylinder has a length in the rotation axis direction in the taper outer cylinder of the head pulley. The taper roller is set to be shorter than the length in the rotation axis direction, the large-diameter side end of the tapered outer cylinder is located near the outer peripheral edge of the sector belt, and the peripheral surface of the tapered outer cylinder is the head pulley. By arranging the portion near the outer periphery of the length from the main part of the fan-shaped belt to be wound to the outer peripheral edge in an inclined state so as to press against the peripheral surface of the tapered outer cylinder of the head pulley, It is possible to prevent slippage between the fan belt and the fan belt when the head pulley rotates. In addition, by arranging the holding pulley as described above, the influence of stress in the required direction due to the deviation of the shape of the sector belt itself and the shape of the end pulley and the folded shape of the folded fan belt is exerted on the driving force from the head pulley most. It can be reduced because it is pressed by a portion close to the outer periphery of the length from the main point of the sector belt to the outer peripheral edge, and the sector belt can be prevented from shifting in the inner diameter direction.

  Further, for example, in the case of a belt conveyor device for transporting a small and lightweight transported object, the size of each component may be small, so that the transport force may be small. In order to connect small conveyor belt conveyors, the head pulley and tail pulley must use a tapered roller having a tapered outer cylinder in which the diameter of the small-diameter side end and the diameter of the large-diameter side end are relatively small. There is a risk of damaging the transported items at the connection point. In the case of such an end pulley, the center axis of the end pulley becomes thin, and the amount of bending of the pulley itself is large. Accordingly, the above-described pressing roller is configured such that the large-diameter side end of the tapered outer cylinder is positioned in the vicinity of the outer peripheral edge of the fan-shaped belt, and the peripheral surface of the tapered outer cylinder is from the main part of the fan-shaped belt wound around the head pulley. Suppressing the deflection of the driven head pulley by placing it in an inclined state so that the portion close to the outer circumference of the length up to the portion is pressed toward the peripheral surface of the tapered portion of the outer cylinder of the head pulley In addition, the fan belt can be stably driven. In addition, since the belt surface of the fan-shaped belt wound around the head pulley is pressed by the peripheral surface of the taper outer cylinder of the pulley, when using a straight pulley in which a plurality of short pulleys are arranged in parallel, The occurrence of a plurality of scraped lines can be suppressed, and the fan belt can be prevented from being worn.

  The guide wheel unit includes a first guide wheel with which the back surface of the outer peripheral edge of the belt portion on the forward side and the return side of the fan-shaped belt wound around the head pulley and the tail pulley, respectively, and a lower end portion on the apparatus frame. The first guide member that holds the first guide wheel rotatably around the horizontal axis, and the outer peripheral edge of the belt portion on the forward side of the sector belt. The second guide wheel abutted from the main side of the sector belt to the protruding portion protruding to the front side, and the second guide wheel are rotatably supported and fixed to the upper end portion of the first holding member. A second holding member; a third guide wheel abutting from the main side of the sector belt on a raised portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt; and a third guide A third holding member that is fixed to a portion of the first holding member of the device frame that is located on the main side of the sector belt in a state in which the reel is rotatably supported, and the guide wheel unit is The vertical pressure of the first holding member indicates that the pressing force applied to the second guide wheel that is pressed by the raised portion protruding to the front side of the outer peripheral edge of the forward belt portion varies due to the position variation of the raised portion. In the state where the raised portion of the thick edge located at the outer peripheral edge of the belt portion on the forward side of the fan-shaped belt and the second guide wheel are always in contact with each other As a result, the deviation of the endless belt in the inner diameter direction can be minimized.

  Further, the third guide wheel of the guide wheel unit is pressed by the reaction force against the raised portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt when the sector belt runs. The return side belt portion of the belt is pushed out by the driven head pulley to become a loose side belt portion, so that the stress in the inner diameter direction generated on the return side belt portion of the sector belt becomes the tension side by driving the head pulley. It is smaller than the stress generated in the forward belt portion. Therefore, the pressing force to the third guide wheel is small, and distortion due to the location in the outer diameter direction of the fan belt at the outer peripheral edge of the fan belt is small. Therefore, the fan belt of the first holding member of the apparatus frame After the lower end portion of the third holding member is weakly fastened to the apparatus frame at a portion located on the main side, the sector belt is driven in advance, and the third guide wheel is moved to the front side of the outer peripheral edge portion on the return side of the sector belt. After reaching the position where it does not bite into the protruding raised portion, the lower end of the third holding member is fastened and fixed to the apparatus frame, so that sufficient adjustment can be made. As a result, the deviation of the endless belt in the inner diameter direction can be minimized.

  Further, the first guide wheel constituting the guide wheel unit is configured such that the sector belt is connected to the sector belt while preventing the outer peripheral edge of the belt portion on the forward side of the sector belt from falling off with the second guide wheel. A first position where the fan belt is pulled in the outer circumferential direction of the sector belt while preventing the outer peripheral edge of the belt portion on the return side of the sector belt from falling off with the third guide wheel. , It is possible to slide between the first position and the second position where the sector belt can be attached and detached. A collar is externally fitted around the rotational axis of the first guide wheel at a position radially outside the sector belt of the first guide wheel. The first guide wheel is pivotally supported by the first holding member so as to be slidable in the shaft fitting hole of the holding member, and the guide wheel unit has the first guide wheel at the first position. Abutting against the first holding member at a certain time, and moving to a position separated from the first holding member when the first guide wheel slides from the first position to the second position; A plate-like member attached to the rotation shaft of the first guide wheel and the plate-like member abutted on the first holding member are fastened to the first holding member, and the first guide wheel Since the fan-shaped belt can be attached and detached without disassembling the guide wheel unit, the maintenance performance can be improved.

  The fastening member includes a cylindrical member having a locking portion that is inserted into an insertion hole provided in the first holding member when the first guide wheel moves from the second position to the first position; By pressing into the cylindrical member, the locking part of the cylindrical member is pushed out radially outward of the cylindrical member, and the pressing member is configured to lock the locking part of the cylindrical member in the insertion hole. Thus, it is possible to improve the working efficiency when attaching and detaching the sector belt with an easy configuration.

  Further, a small-diameter side end of the presser pulley in the tapered outer cylinder, a small-diameter side end of the tapered section of the head pulley, and a small-diameter end of the tapered section of the tail pulley in the outer cylinder are spherical bearings. Therefore, the accuracy when attaching each pulley to the apparatus frame can be improved, and the sector belts respectively wound around the head pulley and the tail pulley can be stably run.

It is a top view which shows one Embodiment of a curve belt conveyor apparatus. It is a top view which shows the outline when the fan-shaped belt and cover of a curve belt conveyor apparatus are removed. It is a side view when a curved belt conveyor apparatus is visually recognized from the tail pulley which is a driven side. It is a side view when a curved belt conveyor apparatus is visually recognized from the head pulley which is a drive side. It is a perspective view which shows an example of a structure of a take-up unit. It is sectional drawing which shows the arrangement configuration of the guide wheel unit at the time of driving | running | working of a sector belt. It is sectional drawing which shows the arrangement configuration of the guide wheel unit at the time of attachment or detachment of a sector belt. It is sectional drawing which shows the structure of the guide wheel unit which shows the state by which the 3rd guide wheel unit was pressed by the protruding part of the thick end part of a sector belt.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, the curved belt conveyor device 10 supports the outer peripheral edge (profile) of the endless fan belt 15 wound around the tail pulley 16 and the head pulley 17 by a large number of guide wheel units 20. Then, the fan belt 15 is held in a state in which the outer peripheral edge portion is stretched. The curve belt conveyor apparatus 10 shown in the present embodiment is a small curve belt conveyor apparatus that conveys a relatively light conveyance object such as food or cosmetics (conveyance object up to about 10 kg), and is arranged upstream. The conveyance direction of the conveyed product conveyed in the Y direction in FIG. 1 by the belt conveyor device is changed to the −X direction in FIG. 1 rotated 90 degrees counterclockwise.

  The curved belt conveyor device 10 has a structure in which a presser pulley 21, a drive unit 22 and the like are assembled in addition to the above-described fan belt 15, tail pulley 16, head pulley 17, and guide wheel unit 20 on a device frame 14 serving as a base. Become. Reference numeral 23 denotes a cover that covers the outer peripheral edge portions of the guide wheel unit 20 and the sector belt 15 and prevents the conveyed product from being caught.

  The apparatus frame 14 has cross members 26, 27, 28 fixed radially between two arc-shaped angles 24, 25 that are different in length and curved so that the center is located at the same position. The floor plate 29 having a shape is fixed. Above the device frame 14, a fan-shaped support plate (bed) 31 that supports the back surface of the side plate 30 and the belt portion on the forward side of the fan-shaped belt 15 is provided. The support plate 31 has an inner peripheral end fixed to the side plate 30 and an outer peripheral end supported by support members 34, 35, 36, and 37. As a result, the support plate 31 is held above the floor plate 29 in a state of being spaced a predetermined distance from the floor plate 29. Here, the support members 34, 35, 36, and 37 are respectively fixed at predetermined intervals via a support base (not shown) fixed to the outer peripheral end portion of the floor plate 29. The support members 34, 35, 36, and 37 are disposed between adjacent guide wheel units 20 among the guide wheel units 20 that are disposed at a predetermined angular interval.

  The tail pulley 16 and the head pulley 17 are tapered rollers in which the taper angles of the tapered outer cylinders are set to the same angle. At both ends in the axial direction of the tapered outer cylinder of the tail pulley 16 and the head pulley 17, the end portion having a large diameter is referred to as a large-diameter side end portion, and the end portion having a small diameter is referred to as a small-diameter side end portion. Here, the diameter of the large-diameter side end of the tapered outer cylinder of the tail pulley 16 and the diameter of the small-diameter side end, and the diameter of the large-diameter end of the tapered outer cylinder of the head pulley 17 and the diameter of the small-diameter side end. And each have the same diameter. Further, in the tapered outer cylinders of the tail pulley 16 and the head pulley 17, the diameter of the large-diameter end is set to 21.9 mm, for example, and the diameter of the small-diameter end is set to 6.3 mm, for example. This is a balance with the length of the conveyed product, and may be set to such a diameter that the conveyed product does not greatly shake when connecting the upstream and downstream conveyors.

  The tail pulley 16 and the head pulley 17 have a predetermined opening angle between the rotation shafts of the pulleys, and the large-diameter side ends of the tapered outer cylinders of the pulleys are the outer peripheral ends of the floor plate 29 (in other words, fan-shaped belts). 15 on the outer peripheral edge position) side. When the taper angle of the tapered outer cylinders of the tail pulley 16 and the head pulley 17 is set to 1.76 degrees, for example, the angle formed by the rotation axis of the tail pulley 16 and the rotation axis of the head pulley 17, that is, the opening angle is, for example, It is set to 88.24 degrees.

  The tail pulley 16 is incorporated in the apparatus frame 14 with the rotating shafts positioned outside both ends of the tapered outer cylinder being supported by the spherical bearings 40 and 41, respectively. In the state where the tail pulley 16 is incorporated in the apparatus frame 14, the rotational axis direction of the tail pulley 16 is ½ of the taper angle with respect to the horizontal plane from the small-diameter end to the large-diameter end of the tapered outer cylinder. (For example, 0.88 degree) It hold | maintains in the state inclined downward.

  A spherical bearing 40 that supports a rotating shaft located outside the small-diameter end of the tapered outer cylinder of the tail pulley 16 is held by a take-up unit 42 provided at one end of the side plate 30. Since the spherical bearing 40 is held by the take-up unit 42, the position of the spherical bearing 40 can be adjusted (in other words, the position of the rotating shaft of the tail pulley 16 can be adjusted). In addition, the spherical bearing 41 that supports the rotating shaft located outside the small diameter side end of the tapered outer cylinder of the tail pulley 16 is held by a bracket 43 that is fixed to the outer peripheral end of the floor plate 29 of the apparatus frame 14.

  The head pulley 17 is incorporated in the apparatus frame 14 with the rotation shafts located outside the both ends of the tapered outer cylinder being supported by the spherical bearings 51 and 52, respectively. In the state incorporated in the apparatus frame 14, the head pulley 17 has a rotation axis direction of ½ of the taper angle with respect to the horizontal plane from the small-diameter side end to the large-diameter side end of the tapered outer cylinder. An angle (for example, 0.88 degrees) is held in a downwardly inclined state.

  A spherical bearing 51 that supports a rotation shaft located outside the small-diameter end of the tapered outer cylinder of the head pulley 17 is located outside the small-diameter end of the tapered outer cylinder of the tail pulley 16 of the side plate 30. The spherical bearing 40 that supports the rotating shaft is held by a take-up unit 53 provided at an end opposite to the end to which the spherical bearing 40 is fixed. Since the spherical bearing 51 is held by the take-up unit 53, the position of the spherical bearing 51 can be adjusted (in other words, the position of the rotating shaft of the tail pulley 16 can be adjusted). In addition, the spherical bearing 52 that supports the rotation shaft located outside the small diameter side end of the tapered outer cylinder of the head pulley 17 is held by a bracket 54 that is fixed to the outer peripheral end of the floor plate 29 of the apparatus frame 14. .

  The spherical bearing 40 that supports the rotating shaft located outside the small diameter side end of the tapered outer cylinder of the tail pulley 16 described above is fixed to the take-up unit 42. As shown in FIG. 5, the take-up unit 42 includes an L-shaped bracket 45, a full screw (dimension bolt) 46, and two nuts 47 and 48. A spherical bearing 40 is fixed to one piece 45 a of the bracket 45. The one piece 45a of the bracket 45 is notched at the center portion in the vertical direction, and a part of the spherical bearing 40 is inserted into the notched portion. Further, one end of the entire screw 46 is fixed to the center of the other piece 45b of the bracket 45 in the vertical direction by welding or the like.

  The take-up unit 42 screws the nut 48 in a state where the entire screw 46 screwed with the nut 47 is inserted into the insertion hole 49 a of the support piece 49 provided in the side frame 30, and the nut 47 to the support piece 49 is inserted. , 48 is adjusted to adjust the position of the spherical bearing 40. Reference numeral 50 denotes a support piece that supports the lower surface of the bracket 45.

  A spherical bearing 51 that pivotally supports a small diameter side end portion of the tapered outer cylinder of the head pulley 17 is fixed to the take-up unit 53. The take-up unit 53 is composed of an L-shaped bracket 55, a full screw (dimension bolt) 56, and two nuts 57, 58, similar to the take-up unit 42. Therefore, details of the take-up unit 53 are omitted. The take-up unit 53 screws the nut 58 in a state where all the screws 56 screwed with the nut 57 are inserted into the insertion holes 59a of the support pieces 59 provided in the side frame 30, and the nut 57 to the support pieces 59 is inserted. , 58 is adjusted to adjust the position of the spherical bearing 51. Reference numeral 60 denotes a support piece that supports the lower surface of the bracket 55.

  In the curved belt conveyor device 10 of this embodiment, the end pulley 16 is adjusted by adjusting the position of the spherical bearing fixed to at least one of the take-up unit 42 or the take-up unit 53 described above by tightening two nuts. , 17 can be applied with an optimal tension.

  The drive unit 22 is assembled to a rotating shaft located outside the large-diameter end of the tapered outer cylinder of the head pulley 17. The drive unit 22 includes a motor (hollow shaft motor) 65 and a speed reducer 66, and a torque arm 67 provided in the drive unit 22 is used for a bracket 68 provided on an outer peripheral end portion of the floor plate 29 of the apparatus frame 14. And fix. Therefore, when the drive unit 22 is driven, the head pulley 17 rotates, and the tail pulley 16 and the fan belt 15 wound around the head pulley 17 travel in the direction A in FIG.

  The guide wheel unit 20 sandwiches the outer peripheral edge of the sector belt 15 wound around the head pulley 17 and the tail pulley 16 from the front side and the back side, and pulls the sector belt 15 in the direction from the center of the sector belt 15 to the outer periphery. When the fan belt 15 is running, the fan belt 15 is prevented from shifting to the main side of the fan belt. A plurality of guide wheel units 20 are provided at the outer peripheral end of the floor plate 29 of the apparatus frame 14 at the same angular interval and along the outer peripheral edge of the sector belt 15. FIG. 2 shows a case where 17 guide wheel units 20 are provided along the outer peripheral edge of the sector belt 15.

  As shown in FIGS. 6 and 7, the guide wheel unit 20 is in contact with the back surface of the outer peripheral edge portion of the forward belt portion of the sector belt 15 and the back surface of the outer peripheral edge portion of the return belt portion. The first and second guide wheels 71, 72, the third guide wheel 73 in contact with the outer peripheral surface of the belt portion on the forward side of the sector belt 15, and the belt portion on the return side of the sector belt 15. It has the 4th guide wheel 74 contacted | abutted on the surface of an outer periphery part, and the bracket (The brackets 76, 85, and 90 mentioned later are equivalent) holding these guide wheels. As the first to fourth guide wheels 71, 72, 73, 74, for example, rolling bearings (bearings) are used in which the central shaft is fitted to the inner ring and the portion that slides on the sector belt 15 is the outer ring. It is done.

  The first and second guide wheels 71 and 72 are rotatably held by a bracket 76 whose lower end is fixed (fastened) to the floor plate 29 of the apparatus frame 14. When the lower end portion of the bracket 76 is fixed to the apparatus frame 14, the bracket 76 includes a piece 76a that rises vertically, and the first and second guide wheels 71 and 72 are rotatably held by the piece 76a. The first guide wheel 71 and the second guide wheel 72 are attached to a support bolt 79 inserted through the spacer 77 and the sleeve 78 in the order of the first guide wheel 71 and the second guide wheel 72. A collar 80 is externally fitted to the tip of the threaded portion. In this state, the tip of the threaded portion of the support bolt 79 is inserted into the insertion hole 76b provided in the bracket 76 and the insertion hole 81a of the holding plate 81, and then the nut 82 is screwed together. Here, the diameter of the insertion hole 76b provided in the bracket 76 is formed to be slightly larger than the outer diameter of the collar 80, and the first and second guide wheels 71 and 72 held by the support bolts 79 are held. Between the position where the plate 81 abuts against the bracket 76 (position shown in FIG. 6) and the position where the side surface of the second guide wheel 72 abuts against the bracket 76 (position shown in FIG. 7). The belt 15 can be slid (slid) in the inner diameter direction (direction from the outer periphery of the sector belt 15 to the center) or in the outer diameter direction (direction from the center of the sector belt 15 to the outer periphery). At the time of manufacturing the belt curve conveyor device 10, the holding plate 81 is held on the bracket 76 by a fastening member 96 to be described later in a state of being in contact with the bracket 76. Further, when removing the sector belt 15 of the belt curve conveyor device 10, after the fastening member 96 is removed, the side of the second guide wheel 72 is moved from the position where the holding plate 81 contacts the bracket 76 to the bracket 76. The slider is slid to a contact position, that is, a position separated from the bracket 76.

  The third guide wheel 73 is rotatable to a bracket 85 made of a plate-like member bent at a predetermined angle with the left end in FIG. 6 facing upward and at a right angle, and the right end in FIG. 6 facing upward. Retained. The third guide wheel 73 is held on the inclined piece 85 a of the bracket 85 by the support bolt 87. Reference numeral 88 denotes a sleeve for preventing shaft runout when the third guide wheel 73 rotates, and reference numeral 89 denotes a third guide by forming a gap between the third guide wheel 73 and the inclined piece 85a. This is a collar for reliably rotating the wheel 73. The bracket 85 that holds the third guide wheel 73 is fixed to the upper end of the bracket 76 that holds the first and second guide wheels 71 and 72. Therefore, when the bracket 85 holding the third guide wheel 73 is fixed to the upper end portion of the bracket 76, the edge of the third guide wheel 73 leaves a gap with respect to the surface of the belt portion on the forward side of the sector belt 15. Held in a state. In this state, the third guide wheel 73 abuts from the main side of the sector belt 15 to the raised portion 95a of the thick edge portion 95 protruding to the front side of the outer peripheral edge of the belt portion on the forward side of the sector belt 15. Is done.

  The fourth guide wheel 74 is rotatably held by a bracket 90 made of a plate-like member obtained by bending one end portion bent in an L shape to the other piece side by a predetermined angle. The fourth guide wheel 74 is held on the inclined piece 90 a of the bracket 90 by the support bolt 91. Reference numeral 92 denotes a sleeve for preventing shaft runout when the fourth guide wheel 74 rotates, and reference numeral 93 denotes a fourth guide wheel by forming a gap between the fourth guide wheel 74 and the inclined surface 90a. This is a collar for reliably rotating the wheel 74. Here, the bracket 90 that holds the fourth guide wheel 74 is fixed to the upper surface of the floor plate 29. When the bracket 90 is fixed to the floor plate 29, the fourth guide wheel 74 is held in a state where the edge of the fourth guide wheel 74 is spaced from the belt surface of the belt portion on the return side of the sector belt 15. . In this state, the third guide wheel 73 abuts from the main side of the sector belt 15 to the raised portion 95a of the thick edge portion 95 protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt 15. Is done.

  The fourth guide wheel 74 is fastened to the floor plate 29 of the apparatus frame 14 in the following procedure. First, in order to optimize the pressing force to the fourth guide wheel 74 pressed by the raised portion 95a of the thick edge portion 95 protruding to the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15, 90 is weakly fastened to the apparatus frame 14 at the lower end of the bracket 90 at a portion of the apparatus frame 14 located on the main side of the sector belt 15. Then, after the head pulley 17 is rotated and the sector belt 15 is caused to travel, the fourth guide wheel 74 is raised on the thick edge portion 95 protruding to the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. The lower end portion of the bracket 90 is fastened and fixed to the device frame 14 after reaching a position where it does not bite into the portion 95a.

  In addition to the configuration described above, the guide wheel unit 20 includes a fastening member 96 for holding the holding plate 81 at a position where it abuts against the bracket 76. Hereinafter, the case where Nylatch (registered trademark) having a plunger 97 and a grommet 98 formed of a synthetic resin material is used as the fastening member 96 will be described as an example. The plunger 97 is a push-type pin-shaped member in which a head portion 97a that expands in a bowl shape is provided on one end side in the axial direction, and a bulging portion 97b that is expanded in diameter is provided on the other end side in the axial direction. . Note that one end portion in the axial direction where the bulged portion 97 b having an enlarged diameter is provided is an end portion that is locked inside the grommet 98. The grommet 98 is formed in a pipe shape into which one end in the axial direction provided with the bulging portion 97b of the plunger 97 is inserted, and protrudes radially outward when the bulging portion 97b of the plunger 97 is inserted. A plurality of locking portions 98a are provided. The grommet 98 is held by the holding plate 81 in a state of being inserted into the insertion hole 81 b provided in the holding plate 81.

  For example, when the sector belt 15 is wound around the tail pulley 16 and the head pulley 17, the first and second guide wheels 71 and 72 are held at positions where the side surfaces of the second guide wheel 72 abut against the bracket 76. The holding plate 81 is held at a position separated from the bracket 76 by a predetermined amount. In this state, the tips of the plurality of locking portions 98 a provided on the grommet 98 are inserted into the insertion holes 76 c of the bracket 76. The gap generated between the first guide wheel 71 and the third guide wheel 73 is a raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15. The gap is wider than the thickness of the portion where the is provided. In addition, a gap generated between the first guide wheel 71 and the fourth guide wheel 74 is a raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. The gap is wider than the thickness of the portion where the is provided. Therefore, after winding the sector belt 15 around the tail pulley 16 and the head pulley 17, the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15 is interposed between the first guide wheel 71 and the third guide wheel 73. Insert into the resulting gap. When the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15 is inserted into a gap formed between the first guide wheel 71 and the third guide wheel 73, the third guide wheel 73 moves forward of the sector belt 15. The belt portion 15 is in contact with the raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion from the main side of the sector belt 15.

  Similarly, the outer peripheral edge portion of the belt portion on the return side of the sector belt 15 is inserted into a gap formed between the first guide wheel 71 and the fourth guide wheel 74. When the outer peripheral edge portion of the belt portion on the return side of the sector belt 15 is inserted into the gap formed between the first guide wheel 71 and the fourth guide wheel 74, the fourth guide wheel 74 becomes the outer peripheral edge of the sector belt 15. It will be in the state contact | abutted to the protruding part 95a of the thick edge part 95 provided in the front side of the part. In this state, the bracket 90 that rotatably holds the fourth guide wheel 74 is pressed by the raised portion 95 a of the thick edge portion 95 that protrudes to the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. Since the pressing force to the fourth guide wheel 74 is not optimized, it is weakly fastened to the apparatus frame 14. In this state, after the head pulley 17 is rotated and the sector belt 15 is caused to travel, the fourth guide wheel 74 has a thick edge portion 95 protruding to the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. The lower end of the bracket 90 is fastened and fixed to the device frame 14 after reaching a position where it does not bite into the raised portion 95a.

  Thereafter, the holding plate 81 is moved to a position where it is brought into contact with the bracket 76. When the holding plate 81 is brought into contact with the bracket 76, a plurality of locking portions 98 a provided on the grommet 98 held by the holding plate 81 are respectively inserted into the insertion holes 76 c of the bracket 76. After the holding plate 81 is moved to a position where it comes into contact with the bracket 76, the distal end side of the plunger 97 is inserted into the grommet 98, and the head portion 97 a of the plunger 97 is pushed toward the bracket 76. When the head portion 97a of the plunger 97 is pushed toward the bracket 76, a plurality of locking portions 98a provided on the grommet 98 are pushed radially outward by the bulging portion 97b of the plunger 97 inserted into the grommet 98. put out. Therefore, the plurality of locking portions 98 a provided in the grommet 98 are pressed against the inner wall surface of the insertion hole 76 c of the bracket 76. As a result, the holding plate 81 is locked to the bracket 76.

  In a state in which the holding plate 81 is locked to the bracket 76, a gap generated between the first guide wheel 71 and the third guide wheel 73, and the first guide wheel 71 and the fourth guide wheel 74 are separated. The gaps generated therebetween are narrower than the state before the holding plate 81 is locked to the bracket 76. Specifically, the gap generated between the first guide wheel 71 and the third guide wheel 73 is, for example, the thickness of the outer peripheral edge of the sector belt 15 where the thick edge portion 95 is not provided. The gap is wider than the thickness of the portion where the thick edge portion 95 of the sector belt 15 is provided. In addition, the gap generated between the first guide wheel 71 and the fourth guide wheel 74 is the same as the gap generated between the first guide wheel 71 and the third guide wheel 73. As a result, when the sector belt 15 is caused to travel, the third guide wheel 73 is placed on the raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge of the belt portion on the forward side of the sector belt 15. 15 is maintained in contact with the main side, and it is possible to prevent the first guide wheel 71 and the third guide wheel 73 from dropping out of the gap formed between them. Similarly, the fourth guide wheel 74 is brought into contact with the raised portion 95a of the thick edge portion 95 provided on the outer peripheral edge portion of the belt portion on the return side of the sector belt 15 from the main side of the sector belt 15. This state is maintained, and it is possible to prevent falling off from a gap generated between the first guide wheel 71 and the fourth guide wheel 74.

  On the other hand, when removing the sector belt 15 wound around the tail pulley 16 and the head pulley 17, the head 97 a of the plunger 97 is pulled, and the plunger 97 is pulled out from the grommet 98. When the plunger 97 of the fastening member 96 is pulled out from the grommet 98, each of the plurality of locking portions 98a pushed out by the bulging portion 97b of the plunger 97 returns to the initial position, and the outer peripheral portion of each locking portion 98a. Is eliminated from being pressed against the inner wall surface of the insertion hole of the bracket 76. Therefore, by pulling out the plunger 97 of the fastening member 96 from the grommet 98, the holding plate 81 can be slid to a position where the side surface of the second guide wheel 72 contacts the bracket 76.

  In a state where the holding plate 81 is slid to a position where the side surface of the second guide wheel 72 abuts against the bracket 76, the fan-shaped belt 15 travels between the first guide wheel 71 and the third guide wheel 73. A gap wider than the thickness of the portion where the raised portion 95a of the thick edge portion 95 provided on the outer peripheral edge portion of the belt portion on the side is provided. Further, a portion between the first guide wheel 71 and the fourth guide wheel 74 is provided with a raised portion 95a of the thick edge portion 95 provided on the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. A gap wider than the thickness is generated.

  Accordingly, the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the fan belt 15 is pushed down, and the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the forward belt portion of the fan belt 15 is pushed down. After the contact between the 95 raised portions 95 a and the peripheral surface of the third guide wheel 73 is released, the outer peripheral edge of the sector belt 15 is generated between the first guide wheel 71 and the third guide wheel 73. Pull out from the gap. At the same time, the thick edge portion 95 provided on the outer peripheral edge portion of the belt portion on the return side of the sector belt 15 is pushed up, and the raised portion of the thick edge portion 95 provided on the outer peripheral edge portion of the belt portion on the return side of the sector belt 15 is simultaneously pushed up. 95a and the peripheral surface of the fourth guide wheel 74 are released, and then the outer peripheral edge of the belt portion on the return side of the sector belt 15 is positioned between the first guide wheel 71 and the fourth guide wheel 74. Pull out from the gap that occurs. Thereby, the fan-shaped belt 15 can be attached and detached.

  As described above, in the guide wheel unit 20, the peripheral surface of the third guide wheel 73 contacts the raised portion 95 a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15. In contact therewith, the back side of the outer peripheral edge of the belt portion on the forward side of the sector belt 15 is pressed against the first and second guide wheels 71 and 72. Similarly, in the guide wheel unit 20, the peripheral surface of the fourth guide wheel 74 is in contact with the raised portion 95 a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. The back side of the outer peripheral edge of the belt portion on the return side of the sector belt 15 is pressed against the first and second guide wheels 71 and 72.

  Here, the sector belt 15 is pulled by a head pulley 17 that rotates when the curved belt conveyor device 10 is driven. As described above, since the tail pulley 16 and the head pulley 17 are arranged with a predetermined opening angle in the curved belt conveyor device 10, the sector belt 15 generates a stress in the required direction from the outer periphery. Accordingly, the raised portion 95 a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15 is in a state of pressing the third guide wheel 73.

  For example, consider a case in which a bracket 85 that rotatably holds the third guide wheel 73 is fixed to a side frame or the like provided in the curved belt conveyor device 10. In this case, when the raised portion 95 a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15 presses the third guide wheel 73, the third guide wheel 73 is held. The bracket 85 bends upward. Accordingly, the third guide wheel 73 moves upward. Here, when the assembly accuracy of the plurality of guide wheel units is poor, the guide wheel unit includes a raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15. However, a guide wheel unit that does not come into contact with the third guide wheel 73 is generated. In such a case, the stress generated in the sector belt 15 from the outer periphery of the sector belt 15 in the required direction is distributed to some guide wheel units. Therefore, the amount of bending of the bracket 85 that absorbs the stress in the required direction from the outer periphery of the sector belt 15 generated in the sector belt 15 applied to the guide wheel unit 20 increases. If the deflection amount of the bracket 85 is large, the peripheral surface of the third guide wheel 73 may get over the raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the sector belt 15, and as a result, The sector belt 15 is displaced in the essential direction of the sector belt 15, and slip occurs between the head pulley 17 and the sector belt 15, so that the sector belt 15 cannot travel.

  In the curved belt conveyor apparatus 10 shown in the present embodiment, a bracket 85 that rotatably holds the third guide wheel 73 is fixed to an upper end portion of a bracket 76 that holds the first and second guide wheels 71 and 72. Yes. Here, when the bracket 85 that rotatably holds the third guide wheel 73 is fixed to the upper end portion of the bracket 76 that holds the first and second guide wheels 71 and 72, the belt on the forward side of the sector belt 15. When the raised portion 95a of the thick edge 95 provided on the front side of the outer peripheral edge of the portion presses the third guide wheel 73, the thickness provided on the front side of the outer peripheral edge of the belt portion on the forward side of the sector belt 15 The pressing force of the raised portion 95 a of the edge portion 95 affects not only the bracket 85 but also the bracket 76.

  As shown in FIG. 8, the ridge 95a is displaced from the ridge 95a by displacing it in the required direction as a change in the bulge 95a of the thick edge 95 provided on the front side of the outer peripheral edge of the forward belt portion of the sector belt 15. When the third guide wheel 73 receives a strong pressing force, the upper end portion of the bracket 76 that holds the first and second guide wheels 71 and 72 bends in the essential direction (N direction) of the sector belt 15, and the guide roller unit 20. It absorbs the stress in the essential direction of the sector belt 15 generated in the sector belt 15. In this case, the upper end portion of the bracket 76 is bent, so that the first and second guide wheels 71 and 72 change the angle between the support bolt 79 and the horizontal plane while changing the angle of the bracket belt 76 according to the bending of the bracket 76. Move in the direction. In this state, the contact state between the peripheral surface of the third guide wheel 73 and the raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15 is maintained. . Therefore, the third guide wheel 73 can pull the outer peripheral edge portion of the forward belt portion of the sector belt 15 in the outer diameter direction of the sector belt 15.

  Further, the fourth guide wheel 74 is pressed by the raised portion 95 a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the return side of the sector belt 15. Here, since the belt portion on the return side of the sector belt 15 is pushed toward the end pulley 16 by the head pulley 17 rotated by the drive unit 22, the magnitude of the tension applied to the belt portion on the return side of the sector belt 15 is increased. Is smaller than the magnitude of the tension applied to the forward belt portion. Further, when the sector belt 15 is wound around the head pulley 17 and is pressed against the head pulley 17 by the holding pulley 21, the stress in the inner diameter direction applied to the belt portion on the return side of the sector belt 15 is further increased. Get smaller. Therefore, by bending the bracket 90 that holds the fourth guide wheel 74, it is possible to absorb the stress in the essential direction of the sector belt 15 that is applied to the belt portion on the return side of the sector belt 15. Therefore, the fourth guide wheel 74 can pull the belt portion on the return side of the sector belt 15 in the outer diameter direction of the sector belt 15.

  Thus, when the sector belt 15 is running, the raised portion 95a of the thick edge portion 95a provided on the outer peripheral edge portion of the peripheral surface of the third guide wheel 73 and the belt portion on the forward side of the sector belt 15; And the contact state between the peripheral surface of the fourth guide wheel 74 and the raised portion 95a of the thick edge portion 95 provided on the front side of the outer peripheral edge portion of the belt portion on the forward side of the sector belt 15, respectively. Maintained. Therefore, it is possible to prevent the outer peripheral edge of the sector belt 15 from being damaged.

  Further, in the guide wheel unit 20 of the present embodiment, the first and second guide wheels 71 and 72 are connected to the outer peripheral edge of the outer peripheral edge portion of the forward belt portion of the sector belt 15 and the outer peripheral edge of the return belt portion. It arrange | positions so that it may contact | abut to the back side of a part, respectively. Therefore, it is possible to secure a region for supporting the belt back surface of the outer peripheral edge portion of the sector belt 15, and the occurrence of flapping of the outer peripheral edge portion of the forward belt portion and the outer peripheral edge portion of the return belt portion of the fan belt 15. Can be prevented.

  The pressing pulley 21 presses the fan belt 15 wound around the head pulley 17 against the head pulley 17. The holding pulley 21 is disposed below the head pulley 17 on the outer peripheral edge side of the sector belt 15.

  The presser pulley 21 is a tapered roller whose diameter decreases from the outer periphery of the sector belt 15 toward the main side. The taper angle of the tapered outer cylinder of the holding pulley 21 is set to the same angle as the taper angle of the tapered outer cylinder of the tail pulley 16 and the head pulley 17. The holding pulley 21 is inclined downward from the end of the tapered outer cylinder toward the end of the larger diameter by a taper angle (for example, 17.6 degrees) with respect to the rotation axis direction of the end pulley 17. Is pivotally supported. That is, the rotating shaft of the presser pulley 21 is held in a state inclined by 24.6 degrees with respect to the horizontal plane. The pressing pulley 21 is fixed to the bracket 99 in a state in which both end portions serving as rotation shafts are supported by the spherical bearings 97 and 98. Note that the diameter of the small-diameter end of the tapered outer cylinder of the holding pulley 21 is set larger than the diameter of the large-diameter end of the tapered outer cylinder of the tail pulley 16 and the head pulley 17. For example, the diameter of the large-diameter side end of the tapered outer cylinder of the holding pulley 21 is set to 29 mm, for example, and the diameter of the small-diameter side end of the tapered outer cylinder is set to 22.9 mm, for example.

  As described above, the diameter of the small diameter end of the tapered outer cylinder of the tail pulley 16 and the head pulley 17 is set to, for example, 6.3 mm, and the diameter of the large diameter end of the tapered outer cylinder is set to, for example, 21.9 mm. . The length of the tapered outer cylinder of the head pulley 17 in the rotation axis direction is set to 510 mm, for example. When such a relatively thin taper roller is used in a curved belt conveyor apparatus, the pulley itself may bend because the rotating shaft has a small diameter.

  Therefore, the length of the taper outer cylinder of the holding pulley 21 in the rotation axis direction is set to the same length as the taper-shaped outer cylinder of the head pulley 17 in the rotation axis direction. It is desirable to press the sector belt 15 against the peripheral surface of the tapered outer cylinder of the head pulley 17 by the surface. However, when a thin taper roller is used, it is difficult in design to hold the holding pulley 21 below the head pulley 17. Therefore, the length of the taper outer cylinder of the holding pulley 21 in the rotation axis direction is set shorter than the length of the taper-shaped outer cylinder of the head pulley 17 in the rotation axis direction. In other words, when the length of the taper-shaped outer cylinder of the head pulley 17 is set to, for example, 510 mm, the length of the taper outer cylinder of the presser pulley 21 is set to, for example, 200 mm. .

  Next, the position of the holding pulley 21 with respect to the head pulley 17 will be described. When the press pulley 21 having a short length in the rotation axis direction with respect to the head pulley 17 is used, the press pulley 21 is generally arranged so as to be in contact with the central portion in the width direction of the sector belt 15. . When the pressing pulley 21 is arranged at a central portion in the width direction of the sector belt 15 or shifted from the center in the width direction to the main side of the sector belt 15, the occurrence of bending of the end pulley 17 can be suppressed. 15, when stress (for example, 4.75 kg) from the outer periphery to the required direction is received only by the plurality of guide wheel units 20, the stress is distributed to each of the guide wheel units 20, but the burden is large. . Therefore, in this embodiment, the holding pulley 21 is disposed at a position where the outer peripheral edge of the sector belt 15 can be pressed against the head pulley 17. Thereby, when the head pulley 17 rotates, generation | occurrence | production of the slip with the fan-shaped belt 15 wound around the head pulley 17 can be suppressed. In addition to this, it is possible to suppress the deflection generated in the head pulley 17 and to suppress the stress load on the guide wheel unit 20 from the outer periphery generated in the sector belt 17 to the required direction.

  In addition, the curved belt conveyor apparatus 10 of this embodiment uses a taper roller as the pressing pulley 21. For example, the curved belt conveyor device 10 generally uses a holding pulley made of a straight pulley in which a plurality of short pulleys are arranged in parallel because the sector belt 15 has a different peripheral speed depending on the position in the width direction. However, in such a press pulley, since the short pulleys are individually brought into contact with the belt surface of the sector belt, a number of shaving lines indicating that the belt surface has been scraped are generated, leading to damage to the sector belt. In addition, the curved belt conveyor device 10 of the present embodiment is intended to transport food, cosmetics, and the like as a transported object, and therefore, on the hygiene side, it is impossible to use a pressing pulley that causes the above-described problem. Therefore, in the present embodiment, by using a taper roller as the pressing pulley 21, the above-described problems are solved and the breakage of the sector belt 15 is suppressed.

  Thus, in the curved belt conveyor apparatus 10 illustrated in this embodiment, when the fan belt 15 is caused to travel by the head pulley 17 that is rotated by the drive of the drive unit 22, the fan belt 15 wound around the head pulley 17. Is sent toward the tail pulley 16 while being pressed toward the head pulley 17 by the presser pulley 21 disposed below the head pulley 17. Therefore, it is possible to suppress the stress in the necessary direction from the outer periphery of the sector belt 15 generated in the sector belt 15 wound around the tail pulley 16 and the head pulley 17.

  In addition, a plurality of guide wheel units 20 are arranged at predetermined angular intervals on the outer peripheral edge of the sector belt 15. For example, when the third guide wheel 43 of a specific guide wheel unit 20 is fixed to the outer side in the outer diameter direction of the sector belt 15 with respect to the normal position, the third guide wheel 43 of the target guide wheel unit 20 Therefore, an excessive stress is applied as compared with the other guide wheel unit 20. In the present embodiment, when the guide wheel unit 20 is subjected to stress in the required direction from the outer periphery of the sector belt 15 on the third guide wheel 73, the bracket 76 that holds the first and second guide wheels 71 and 72 bends, As a result, the stress from the sector belt 15 can be distributed and applied to the other guide wheel units 20 as well. Further, as described above, the stress applied to each guide wheel unit 20 can be suppressed by reducing the stress in the required direction from the outer periphery of the sector belt 15 generated in the sector belt 15 by the pressing pulley 21. It is possible to prevent the guide wheel unit 20 itself from being damaged and the outer peripheral edge of the sector belt 15 from being damaged.

  In the present embodiment, the first and second guide wheels are used as the guide wheels that are in contact with the back side of the outer peripheral edge of the forward belt portion of the sector belt 15 and the back of the outer peripheral edge of the return belt portion, respectively. In this example, two guide wheels 71 and 72 are arranged in parallel, and rolling bearings are used as these guide wheels. However, when a guide wheel having a wider width than the rolling bearing used as the first and second guide wheels 71 and 72 can be used, one guide wheel may be used.

  DESCRIPTION OF SYMBOLS 10 ... Curve belt conveyor apparatus, 15 ... Fan-shaped belt, 16 ... Tail pulley, 17 ... Head pulley, 20 ... Guide wheel unit, 21 ... Holding pulley, 42, 53 ... Take-up unit, 71 ... First guide wheel, 72 ... Second guide wheel 73 ... Third guide wheel 74 ... Fourth guide wheel 95 ... Thick edge 95a ... Raised portion 96 ... Fastening member 97 ... Plunger 98 ... Grommet

Claims (8)

An endless fan-shaped belt provided with an edge protruding from the surface in a substantially semicircular cross section near the outer periphery as an outer peripheral edge,
A head pulley composed of a tapered roller and driven by a motor;
A tail pulley composed of a taper roller having the same angle as the taper angle of the head pulley, and driven by the rotation of the head pulley;
A device frame that pivotally supports the head pulley and the tail pulley in a state where the head pulley and the tail pulley are inclined so as to have a predetermined opening angle and the upper surface of the fan-shaped belt wound around the head pulley and the tail pulley is in a horizontal plane;
The fan belt is provided on the apparatus frame along the vicinity of the outer peripheral edge of the sector belt, and the outer peripheral edge of the sector belt wound around the head pulley and the tail pulley is sandwiched from the front side and the back side, whereby the sector belt is A plurality of guide wheel units that pull in the direction from the center of the sector belt to the outer periphery;
The main side of the sector belt is fixed to the apparatus frame, and the outer peripheral side of the sector belt is fixed to the apparatus frame from the gaps of the plurality of guide wheel units using a support member, thereby being horizontal to the apparatus frame. A bed supported by the fan belt;
A holding pulley disposed below the head pulley and pressing the fan-shaped belt wound around the head pulley toward the head pulley;
With
The holding pulley has the same angle as the taper angle of the head pulley, and the length of the taper outer cylinder in the rotation axis direction is set shorter than the length of the head pulley in the rotation axis direction of the taper-shaped outer cylinder. Taper roller,
The holding pulley has a large-diameter side end portion of the tapered outer cylinder located in the vicinity of the outer peripheral edge portion of the sector belt, and a peripheral surface of the tapered outer cylinder is wound around the head pulley. Occurs when the head pulley rotates because it is arranged in an inclined state so that a portion close to the outer periphery of the length to the outer peripheral edge is pressed toward the peripheral surface of the tapered outer cylinder of the head pulley. A curved belt conveyor device characterized by preventing slippage with the fan belt back surface. The curved belt conveyor apparatus according to claim 1,
The guide wheel unit is
A first guide wheel with which the back surfaces of the outer peripheral edge portions of the forward and return belt portions of the sector belt wound around the head pulley and the tail pulley are in contact with each other;
A first holding member that holds the first guide wheel rotatably around a horizontal axis at a portion that rises vertically when the lower end is fastened to the device frame;
A second guide wheel that comes into contact with a raised portion protruding from the front side of the outer peripheral edge of the belt portion on the forward side of the sector belt from the main side of the sector belt;
A second holding member fixed to the upper end of the first holding member in a state in which the second guide wheel is rotatably supported;
A third guide wheel that comes into contact with a raised portion protruding from the front side of the outer peripheral edge of the belt portion on the return side of the sector belt, from the main side of the sector belt;
A third holding member that is fixed to a portion of the first holding member of the device frame that is positioned on the main side of the sector belt with the third guide wheel rotatably supported;
Have
In the guide wheel unit, the pressing force applied to the second guide wheel that is pressed by the protruding portion protruding to the front side of the outer peripheral edge of the forward belt portion varies depending on the position variation of the protruding portion. A curved belt conveyor device that absorbs by bending a vertically rising portion of the first holding member. In the curved belt conveyor device according to claim 2,
The guide wheel unit is configured to optimize the pressing force applied to the third guide wheel that is pressed by the protruding portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt. After the lower end portion of the third holding member is weakly fastened to the device frame at a portion of the first holding member located on the main side of the belt portion of the fan belt, the fan belt is driven in advance, The lower end of the third holding member is fastened to the device frame after the third guide wheel is in a position where it does not bite into the raised portion protruding to the front side of the outer peripheral edge of the belt portion on the return side of the sector belt. A curved belt conveyor device characterized by being fixed. In the curved belt conveyor device according to claim 2 or 3,
The first guide wheel pulls the sector belt toward the outer periphery of the sector belt while preventing the outer peripheral edge of the belt portion on the forward side of the sector belt from falling off with the second guide wheel, and A first position for pulling the sector belt in the outer circumferential direction of the sector belt while preventing the outer peripheral edge of the belt portion on the return side of the sector belt from falling off with the third guide wheel, and the first position than the first position. It is possible to slide between a second position that is located on the radially outer side of the sector belt and that can be attached and detached.
The guide wheel unit includes a collar that is fitted around a rotation axis of the first guide wheel at a position radially outside the sector belt of the first guide wheel, and a shaft of the first holding member. The first guide wheel is pivotally supported by the first holding member so as to be slidable in the fitting hole,
The guide wheel unit is
The first guide wheel is in contact with the first holding member when the first guide wheel is in the first position, and the first guide wheel slides from the first position to the second position when the first guide wheel slides from the first position to the second position. A plate-like member attached to the rotating shaft of the first guide wheel, which moves to a position spaced from the holding member;
A fastening member that fastens the plate-like member in contact with the first holding member to the first holding member and holds the first guide wheel in the first position;
A curved belt conveyor device comprising: The curved belt conveyor device according to claim 4,
The fastening member is
A cylindrical member having a locking portion that is inserted into an insertion hole provided in the first holding member when the first guide wheel moves from the second position to the first position;
A pressing that pushes the locking portion of the cylindrical member outward in the radial direction of the cylindrical member by being pushed into the cylindrical member, and locks the locking portion of the cylindrical member in the insertion hole. Members,
A curved belt conveyor device comprising: In the curve belt conveyor device according to any one of claims 2 to 5,
The first guide wheel, the second guide wheel, and the third guide wheel are rolling bearings in which a central shaft is fitted to an inner ring and a portion that slides with the sector belt is an outer ring. Curve belt conveyor device. The curved belt conveyor device according to any one of claims 2 to 6,
The curve belt characterized in that the first guide wheel is at least two or more rolling bearings arranged in parallel with a center shaft fitted to an inner ring and a portion sliding with the fan belt as an outer ring. Conveyor device. In the curve belt conveyor device according to any one of claims 1 to 7,
A small-diameter end of the tapered pulley in the tapered outer cylinder, a small-diameter end of the tapered outer cylinder of the head pulley, and a small-diameter end of the tapered outer cylinder of the tail pulley are supported by spherical bearings. A curved belt conveyor device.

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