JP2010163243A - Belt junction conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably and surely sort a carrying object to be carried without imparting an impact from a side surface for preventing damage to the carrying object to the carrying object to be carried. <P>SOLUTION: A first connecting rod and a second connecting rod are installed at the upstream side of a carrier conveyor in the carrying direction of the carrying object with the other end side of the first connecting rod and the other end side of the second connecting rod as the rotational center so that the rotational center of the first connecting rod coincides with the rotational center of the second connecting rod. An interlocking mechanism for interlocking the first connecting rod with the second connecting rod is arranged so that the first connecting rod and the second connecting rod rotate in the opposite direction. A drive mechanism is arranged at the downstream side in the carrying direction in the carrier conveyor part, and arranged for rotating a sub-support frame by the interlocking mechanism by rotating a main support frame with the other end side of the first connecting rod as the rotational center. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a belt junction conveyor that sorts a conveyed product that is conveyed by a belt conveyor, and more particularly to a belt junction conveyor that rotates a conveying conveyor unit that conveys the conveyed product to the left and right to sort the conveyed product.

  Conventionally, conveyed items such as airport baggage and mail are generally sorted in the process of being conveyed by a belt conveyor. As a method of sorting the conveyed product in the process of being conveyed, for example, a pusher is arranged at a branching portion between a main belt conveyor and a belt conveyor branched from the belt conveyor, and whether or not the conveyed item is pushed out by this pusher. There have been proposed a method for sorting a conveyed product, a method for sorting a conveyed product by rotating a conveyance conveyor unit that conveys the conveyed product left and right, and the like (for example, Patent Document 1 and Patent Document 2).

  In the case of Patent Document 1, two folding rollers, one end of which is pivotally supported by the conveyor frame, are arranged inside the conveyor frame in which the left and right frames are connected using a plurality of connecting rods. The other end of the cylinder attached to the base frame is attached to the other end of the folding roller disposed on the upstream side, and the other end of the folding roller disposed on the upstream side and the folding disposed on the downstream side. A belt junction conveyor has been proposed in which the other end of the roller is connected by a link. In this belt junction conveyor, the shape of the conveyor frame changes by changing the position and angle of the folding roller with respect to the base frame by expanding and contracting the cylinder. Thereby, it becomes possible to switch the conveyance direction of the conveyed product conveyed by a belt junction conveyor, ie, to sort a conveyed product. However, in the belt junction conveyor having such a configuration, the apparatus configuration is complicated, and it is difficult to accurately switch the transport direction of the transported object. Furthermore, due to the approach between the frames on both sides due to the deformation of the conveyor frame, the distance between the connecting rods on the conveyor frames on both sides is widened so that the conveyor belt is not interfered with the frame from the side, and the cylinder and the link mechanism are distributed conveyors. Since it is necessary to overhang the side of the conveying surface, a wide space is required around the sorting conveyor. In addition, it is impossible to set a large rotation angle because of the driving mechanism.

  In the case of Patent Document 2, a movable member that supports a belt bending portion formed between a transport conveyor portion and a movable belt portion and a movable belt support member that indicates the movable belt portion are rotatable about a rotation shaft. It is proposed to sort the conveyed items conveyed by the conveying belt unit by rotating each of these members by a predetermined amount using the drive source of the sorting mechanism unit. In this Patent Document 2, it is possible to switch the transport direction of the transported object without using a complicated mechanism compared to Patent Document 1, but in the case of this Patent Document 2, the movable belt support member and the movable member are switched. Since the moment of inertia generated at the time of rotation is considered, the output performance is high, that is, the rotation shaft is rotated with a high torque and the stopping accuracy is good. It is necessary to use a drive source.

  The present invention has been invented to solve the above-described problems, and can convey the conveyed objects stably and reliably with an easy configuration, and has a minimum installation area. It is an object of the present invention to provide a belt junction conveyor having a clean structure without a structure that may cause a load to be caught on the side of the conveyance surface.

  In order to solve such a problem, a belt junction conveyor according to the present invention includes a main support frame on which a drive pulley for driving an endless belt on which a transport conveyor unit for sorting a transported object is rotatably mounted, and the endless belt. A sub-support frame on which a tail pulley around which the belt is wound is rotatably mounted, an endless belt on which the main support frame and the sub-support frame are placed and wound around the drive pulley and the tail pulley, And a first frame in which the main support frame is attached to one end side, and a base frame to which two folding members are turned back on the upstream side of the transport conveyor unit in the transport direction of the transported object. A rod, a second connecting rod to which the sub-support frame is attached at one end, and the other end of the first connecting rod And the other end side of the second connecting rod is the center of rotation, and the first connecting rod and the center of rotation of the second connecting rod coincide with each other. The first connecting rod and the second connecting rod are attached so that the first connecting rod and the second connecting rod rotate in directions opposite to each other. And an interlocking mechanism for interlocking the main support frame with the other end of the first connecting rod as a center of rotation. And a drive mechanism for rotating the auxiliary support frame via the mechanism.

  Further, the interlock mechanism includes a first gear to which the other end of the first connecting rod is attached, and the other end of the second connecting rod, which is coaxial with the first gear and the first gear. A second gear arranged to rotate separately from the first gear; and when the first gear rotates, the rotation direction of the second gear is opposite to the rotation direction of the first gear. A plurality of gears that transmit the rotation of the first gear to the second gear so that the rotation amount of the second gear is equal to the rotation amount of the first gear. It is preferable that it is comprised from these.

  The drive mechanism is provided on the base frame and has a rail having an arc shape, a timing belt whose both ends are fixed at both ends of the rail, a pulley around which the timing belt is wound, and the pulley Is fixed to the rotary shaft, and is preferably composed of a motor attached to the main support frame, and a plurality of pinch rollers that keep the amount of winding of the timing belt wound around the pulley constant.

  The drive mechanism includes: a motor having a gear fixed to a rotary shaft and attached to the main support frame; and a rack provided on the base frame and having a tooth surface meshing with the gear formed in an arc shape. It is preferable to be configured.

  The drive mechanism is provided with a plurality of metal pieces provided on the main support frame and a plurality of pieces on the base frame, and generates a magnetic field during driving to push out the metal pieces inserted through the magnetic field in a predetermined direction. And a linear motor.

  According to the belt junction conveyor of the present invention, conveyed items can be sorted without using a pusher, a branch arm or the like. In other words, the impact from the side of the conveyed product during sorting by a branch arm or pusher can be prevented from being applied to the conveyed product, so that the conveyed product can be prevented from being damaged, and the lower end of the branched arm and the upper surface of the conveyor belt can be prevented. The conveyed product can be stably sorted without being caught or caught in the gap formed therebetween. Further, by disposing the drive mechanism away from the rotation center of the main support frame, it is possible to suppress the drive force of the drive motor (torque required for rotating the shaft) required for rotating the main support frame. By suppressing the driving force (torque required for shaft rotation) of the drive motor in this way, the drive motor has a small capacity, that is, a small motor is sufficient, and the drive motor when the main support frame is stopped is concerned. It is possible to reduce the load. In addition, by disposing the drive mechanism downstream of the conveyor belt portion and below the conveyor surface, each mechanism constituting the belt junction conveyor can be accommodated in the base frame, so that the apparatus itself can be downsized. It becomes possible.

  Further, by configuring the interlock mechanism from a plurality of gears, the equipment as a belt junction conveyor can be made smaller than when a link mechanism is used, and therefore the manufacturing cost of the belt junction conveyor can be suppressed.

  Further, when a drive motor is used as an actuator used in the drive mechanism, it is possible to adjust the voltage supplied to the motor, the power supply AC frequency, or the operation speed (adjustment such as acceleration / deceleration). It is possible to operate smoothly so as to reduce the impact on each part of the belt junction conveyor such as the main support frame and the sub support frame. In addition, when switching the state of the belt junction conveyor using a drive motor, it is possible to stop the drive motor without stopping it by abutting against a stopper or the like. Therefore, it is possible to extend the life of each part of the belt junction conveyor and to prevent the generation of noise such as vibration noise and impact noise.

  Further, when the drive mechanism is constituted by a pulley attached to the rotating shaft of the drive motor and a timing belt attached to the arc-shaped rail, it is possible to suppress the generation of noise generated when the belt junction conveyor is driven. In addition, when a gear (pinion gear) that can be attached to the rotating shaft of the drive motor and an arc-shaped rack are used, it is not necessary to use other parts, no take-up mechanism is required, and the stop system For example, it is also possible to achieve improvement by simply adding an encoder to the rotating shaft of the motor. Further, when the drive mechanism is configured from the linear motor and the metal piece, it is possible to suppress the generation of the drive sound generated when the drive motor described above is driven, so that it occurs when the belt junction conveyor is driven. Noise can be further suppressed.

It is a figure which shows the case where a belt junction conveyor will be in a 1st conveyance state. It is a figure which shows the case where a belt junction conveyor will be in a 2nd conveyance state. It is a figure which shows the case where a belt junction conveyor will be in a 3rd conveyance state. It is a figure which shows the side surface of a belt junction conveyor. It is a figure which shows the structure of an interlocking mechanism. It is a figure which shows a motion of an interlocking mechanism. It is a figure which shows the positional relationship of a main support frame, a drive mechanism, and a connection rod. It is a figure which shows a motion of a drive mechanism. It is a figure which shows the structure of a drive pulley vicinity. It is a figure which shows the positional relationship of the main support frame and subsupport frame in case a belt junction conveyor will be in a 1st conveyance state. It is a figure which shows the positional relationship of the main support frame and subsupport frame in case a belt junction conveyor will be in a 2nd conveyance state. It is a figure which shows the positional relationship of the main support frame and subsupport frame in case a belt junction conveyor will be in a 3rd conveyance state. It is a figure which shows the positional relationship of a main support frame, a drive mechanism, and a connection rod at the time of using a rack & pinion as a drive mechanism. It is a figure which shows the positional relationship of a main support frame, a drive mechanism, and a connection rod at the time of using a linear motor as a drive mechanism.

  As shown in FIGS. 1-3, the belt junction conveyor 10 of this invention transfers the conveyed product conveyed by the belt conveyor 11 arrange | positioned upstream, and the belt conveyors 12 and 13 provided in the downstream are provided. , 14 is an apparatus that sorts the conveyed items to be conveyed.

  In the following, the state of the belt junction conveyor 10 when transporting the transported object toward the belt conveyor 12 is referred to as a first transport state, and the state of the belt junction conveyor 10 when transporting the transported object toward the belt conveyor 13 is the first state. 2 state, the state of the belt junction conveyor 10 when conveying a conveyed product toward the belt conveyor 14 is demonstrated as a 3rd conveyance state. Further, when the belt junction conveyor 10 is switched between the first transport state and the second transport state, or between the first transport state and the third transport state, a main support frame 21 and a sub support frame 22 described later are switched. It demonstrates as what rotates 30 degrees in the opposite direction, respectively. Further, when the belt junction conveyor 10 is switched between the second transport state and the third transport state, the description will be made assuming that the main support frame 21 and the sub support frame 22 are rotated by 60 ° in opposite directions.

  As shown in FIG. 4, the belt junction conveyor 10 includes a main support frame 21, a sub support frame 22, a base frame 23, connecting rods 24 and 25, an interlock mechanism 26, and a drive mechanism 27. The main support frame 21 is pivotally supported by the main support frame 21 such that the drive pulley 31, the end pulley 32, the take-up pulley 33, and the tension pulley 34 are rotatable and the respective axial directions are parallel to each other.

  The drive pulley 31 is disposed at a position that is approximately the center of the main support frame 21 in a direction orthogonal to the width direction of the main support frame 21. One end of the rotating shaft 31a of the drive pulley 31 is fitted into a fitting type follow shaft 35a which is an output shaft provided in a driving motor 35 having a driving unit described below at a lower portion. This eliminates the need for a coupling or the like for connecting the male and female rotating shafts, and uses the drive motor 35 provided with the follow shaft 35a in which the motor part and the drive transmission part are integrated and made compact. The weight of 21 can be suppressed, and the moment of inertia when the main support frame 21 rotates is reduced.

  The end pulley 32 is disposed on one end side (right end portion in the figure) of the main support frame 21 in the direction orthogonal to the width direction of the main support frame 21, that is, on the downstream side in the transport direction of the transport belt portion provided on the endless belt 85. Is done. As the end pulley 32, a pulley having an aluminum pipe portion is preferably used. The take-up pulley 33 prevents the endless belt 85 that travels from sagging due to aging. Further, the tension pulley 34 is disposed between the folding pulley and the take-up pulley 33, and prevents the endless belt 85 that runs between these pulleys from loosening.

  A drive motor 35 for rotating the drive pulley 31 is provided on the side surface of the main support frame 21 on which these pulleys are pivotally supported. This drive motor 35 is an integrated drive unit that converts the rotational direction of the rotation shaft of the motor, and the drive unit 35 is a follower that fits the rotation shaft 31a of the drive pulley 31 in a direction orthogonal to the rotation shaft of the motor. A shaft 35a is provided. Further, the drive motor 35 is fixed with a slight play around the follow shaft 35a by a torque arm that is hooked on the lower surface of the main support frame 21 by a pin 35b (see FIG. 9). By using such a fixing method, the driving motor 35 can be fixed to the main support frame 21 so that the motor itself does not rotate. As a result, the vibration of the rotating shaft 31a of the drive pulley 31 that is caused when the bolt is firmly fixed to the main support frame 21 without play with a torque arm without using a torque arm is directly transmitted to the follow shaft 35a of the drive motor 35 and damaged. Is prevented.

  On the lower surface of the main support frame 21, there are casters 36 that come into contact with the upper surface of an arc-shaped rail 53 disposed on the upper surface of the base frame 23, and a plate surface (hereinafter referred to as a first stage) provided on the upper surface of the base frame 23. ) 51 and a caster 37 in contact with 51. By providing these casters 36 and 37, the main support frame 21 can be rotated stably with a small force. In addition, these casters 36 and 37 are provided with the axis L1 as a spindle viewing point.

  Further, a wheel 38 is provided in the vicinity of the caster 36. The wheel 38 is in contact with the inner surface of the rail of the base frame with which the caster 36 is in contact. By providing the wheel 38, it is possible to prevent the main support frame 21 from being lifted when the main support frame 21 is rotated or stopped.

  Further, a position detection piece 39 used for alignment of the main support frame 21 when the belt junction conveyor 10 is operated is provided on the lower surface of the main support frame 21 (see FIG. 10). The position detection piece 39 is detected by the photo interrupter 40 provided on the base frame 23 when the belt junction conveyor 10 is in the second transport state (see FIG. 11). Note that the position of the photo interrupter 40 is not limited to this, and the photo interrupter 40 is arranged so that the position detection piece 39 can be detected when the belt junction conveyor 10 is in the first transport state or the third transport state. You may arrange.

  The main support frame 21 includes a connecting member that extends in a direction parallel to the width direction and connects both side surfaces of the main support frame 21, and one end of the connecting rod 24 is attached to the connecting member in the vicinity of the caster 37. .

  The sub support frame 22 includes a tail pulley 45. The tail pulley 45 is pivotally supported by the sub-support frame 22 at the end away from the rotation center (L1) of the sub-support frame 22 among both ends in the direction orthogonal to the width direction. Further, one end of the connecting rod 25 is attached to the end opposite to the end where the tail pulley 45 is pivotally supported, that is, the end on the rotation center (L1) side of the sub-support frame 22. Further, the sub-support frame 22 is provided with casters 46 at three positions, and the axis L1 is provided as a supporting line of the wheels of each caster 46. The sub-support frame 22 can be stably rotated by these casters 46.

  On the base frame 23, the main support frame 21 and the sub support frame 22 described above are placed. A first stage 51, a second stage 52, and a rail 53 are provided on the upper surface of the base frame 23. The casters 37 of the main support frame 21 are in contact with the upper surface of the first stage 51, and the casters 36 of the main support frame 21 are in contact with the upper surface of the rail 53. Further, the casters 46 of the sub-support frame 22 are brought into contact with the second stage 52, respectively. The rail 53 described above has, for example, a U-shaped cross section and a shape in which the longitudinal direction is curved in an arc shape.

  The base frame 23 is rotatably supported by folding rollers 55 and 56 at one end in a direction perpendicular to the width direction. Of these, the folding roller 55 is pivotally supported so that the upper surface of the end pulley 32 is at the same level, and the portion of the endless belt 85 that is stretched between the folding roller and the end pulley 32 is provided as the uppermost surface. . These folding rollers 55 and 56 are arranged above and below at a predetermined interval so that the axial direction thereof coincides with the width direction of the base frame 23.

  The connecting rod 24 is disposed below the folding roller 56 and the second stage 52. One end of the connecting rod 24 is attached to the main support frame 21, and the other end is attached to the interlocking mechanism 26. The connecting rod 25 is disposed in the space between the folding roller 55 and the folding roller 56 and above the second stage 52. One end of the connecting rod 25 is attached to the sub-support frame 22, and the other end is attached to the interlocking mechanism 26.

  The interlocking mechanism 26 is disposed on the upper surface of the base frame 23 and in the vicinity of the folding rollers 55 and 56. The interlocking mechanism 26 is a mechanism that interlocks the rotation of the connecting rod 24 and the rotation of the connecting rod 25. The interlocking mechanism 26 includes a plurality of gears 61 to 66, shafts 67 to 69, and a holding frame 70.

  As shown in FIG. 5, the plurality of gears 61 to 66 are configured from gears having the same number of teeth of each gear. The gears 61 to 66 may be spur gears or helical gears. Of these gears 61 to 66, the gears 61 and 62 are attached to the shaft 67 via a bearing (not shown) at a predetermined interval. By attaching these gears 61 and 62 to the rotary shaft 67 via bearings, the gears 61 and 62 can be individually rotated. One end of the connecting rod 24 is attached to the gear 61, and one end of the connecting rod 25 is attached to the gear 62. As a result, the connecting rod 24 and the connecting rod 25 can be rotated about the shaft 67 as a rotation center. That is, the central axis of the shaft 67 is the axis L1. The gears 63 and 64 are fixed to the shaft 68, and the gears 65 and 66 are fixed to the shaft 69, respectively. The gear 63 meshes with the gear 61, and the gear 64 meshes with the gear 65 fixed to the shaft 69. Further, the gear 66 meshes with the gear 62.

  The shaft 67 is fixed to the holding frame 70 via bearings 71 and 72 provided on a bracket 70a constituting the upper surface of the holding frame 70 and a bracket 70b constituting the lower surface. The shaft 68 is rotatable to the holding frame 70 via bearings 73 and 75 provided on the bracket 70a and the bracket 70b, and the shaft 69 is rotatable via bearings 74 and 76 provided on the bracket 70a and the bracket 70b. Attached to each.

  As shown in FIG. 6, when the connecting rod 24 rotates in the A direction, the gear 61 to which the connecting rod 24 is attached rotates in the same direction as the connecting rod 24 (in this case, the A direction). Since the gear 61 is attached to the shaft 67 via a bearing, when the connecting rod 24 rotates in the A direction, the gear 62 does not rotate in the A direction, and only the gear 61 rotates in the A direction. To do. Since the gear 61 meshes with the gear 63, the gear 63 rotates in the B direction in accordance with the rotation of the gear 61 in the A direction. Since the gear 63 is fixed to the shaft 68 together with the gear 64, when the gear 63 rotates, the shaft 68 and the gear 64 fixed to the shaft 68 also rotate in the B direction.

  Since the gear 64 meshes with the gear 65, the gear 65 rotates in the C direction in accordance with the rotation of the gear 64 in the B direction. Since the gear 65 is fixed to the shaft 69 together with the gear 66, the shaft 69 and the gear 66 fixed to the shaft 69 also rotate in the C direction in accordance with the rotation of the gear 65. Since the gear 66 meshes with the gear 62, the gear 62 rotates in the D direction in accordance with the rotation of the gear 66 in the C direction. As described above, since the connecting rod 25 is attached to the gear 62, the connecting rod 24 rotates in the D direction by the rotation of the gear 62 in the D direction.

  On the other hand, when the connecting rod 24 rotates in the E direction, the gear 61 to which the connecting rod 24 is attached also rotates in the E direction. As the gear 61 rotates in the E direction, the gear 63 engaged with the gear 61 rotates in the F direction. In accordance with the rotation of the gear 63 in the F direction, the shaft 68 and the gear 64 fixed to the shaft 68 also rotate in the F direction. When the gear 64 rotates in the F direction, the gear 65 that meshes with the gear 64 rotates in the G direction. Along with the rotation of the gear 65 in the G direction, the shaft 69 and the gear 65 fixed to the shaft 69 also rotate in the G direction. Since the gear 65 meshes with the gear 62, the gear 62 rotates in the H direction in accordance with the rotation of the gear 65 in the G direction. Since the connecting rod 25 is attached to the gear 62, the connecting rod 25 is also rotated in the H direction by the rotation of the gear 62 in the H direction.

  Thus, by providing the interlocking mechanism 26, the connecting rod 25 rotates in a direction opposite to the rotating direction of the connecting rod 24 in conjunction with the rotation of the connecting rod 24. By making the number of teeth of each of the plurality of gears 61 to 66 the same, the rotation angle when the connecting rod 24 rotates and the rotation angle of the interlocking connecting rod 25 become the same angle. In order to make the angle at which the connecting rod 24 rotates and the angle at which the connecting rod 25 rotate the same angle, six gears 61 to 66 having the same number of teeth are used, but this is not limitative. If the rotation angle of the gear 61 and the rotation angle of the gear 62 are the same angle and the rotation directions of the gears 61 and 62 can be set in opposite directions, the number of gears used for the interlock mechanism 26 is not necessary. The number of gear teeth need not be limited to this embodiment.

  The drive mechanism 27 is provided to rotate about the main support frame 21 as a rotation center. As shown in FIGS. 7 and 8, the drive mechanism 27 includes a drive motor 76, a timing pulley 77, pinch rollers 78 and 79, and a timing belt 80.

  The drive motor 76 is attached to the main support frame 21 via the bracket 81. The bracket 81 allows the drive motor 61 to be connected to the end opposite to the end to which the connecting rod 24 is attached, that is, the endless belt 85 among the both ends in the direction orthogonal to the width direction of the main support frame 21. It is arrange | positioned in the downstream of the conveyance direction in the conveyance belt part. For example, a servo motor is used as the drive motor 76. A timing pulley 77 is fixed to the drive shaft 76 a of the drive motor 76 so as to protrude from the lower surface of the bracket 81.

  The pinch rollers 78 and 79 are pivotally attached to the lower surface of the bracket 81. Note that the pinch rollers 78 and 79 are disposed so as to have substantially the same height as the timing pulley 77 in the height direction of the belt junction conveyor 10. By providing these pinch rollers 78 and 79, the amount of winding of the timing belt 80 wound around the timing pulley 77 can be kept constant. Both ends of the timing belt 80 are fixed at both ends of the side surface of the arc-shaped rail 53 provided on the base frame 23. An adjustment mechanism (not shown) that can adjust the tensioned state of the timing belt 80 is provided at both ends of the peripheral surface of the rail 53, and the both ends of the timing belt 80 are connected via the adjustment mechanism. Each is attached to a rail 53.

  For example, when the drive motor 76 is driven and the timing pulley 77 rotates in the P direction, the timing belt 80 is pulled in the Q direction. However, since both ends of the timing belt 80 are fixed to both ends of the side surface of the rail 53, the timing belt 80 cannot move. As a result, the timing pulley 77 moves in the R direction. Since this timing pulley 77 is attached to the drive shaft 76a of the drive motor 76, the drive motor 76 also moves in accordance with the movement of the timing pulley 77 in the R direction. Move in the R direction. Since the drive motor 76 is attached to the main support frame 21, the main support frame 21 rotates in the R direction around the shaft 67 described above as the rotation of the drive motor 76 in the R direction.

  On the other hand, when the drive motor 76 is driven and the timing pulley 62 rotates in the S direction, the timing belt 80 is pulled in the T direction. However, as described above, both ends of the timing belt 80 are fixed to the side surfaces of the rail 53. Therefore, the timing pulley 77 moves in the U direction. As the timing pulley 77 moves in the U direction, the drive motor 76 also moves in the same direction. Since the drive motor 76 is attached to the main support frame 21, the main support frame 21 rotates in the U direction around the shaft 67 described above as the drive motor 76 moves in the U direction. .

  The endless belt 85 is wound around pulleys attached to the main support frame 21 and the sub support frame 22. That is, the endless belt 85 is wound around the drive pulley 31 so as to be folded back toward the downstream side in the transport direction on the transport surface on the top surface of the belt junction conveyor 10 when the drive pulley 31 is the starting point. The belt is wound around the end pulley 32 and the take-up pulley 33 so as to be folded back toward the upstream side in the transport direction on the transport surface on the upper surface of the conveyor 10. The endless belt 85 folded back in the transport direction on the transport surface on the upper surface of the belt junction conveyor 10 is folded on the return pulleys 55 and 56 so as to be folded downstream in the transport direction on the transport surface on the upper surface of the belt junction conveyor 10. After being respectively wound, the belt junction conveyor 10 is turned back to the downstream side in the transport direction on the transport surface on the upper surface of the belt junction conveyor 10 and wound around the tail pulley 45 so as to be endless on the pulley surface.

  Among the endless belts 85 wound around these pulleys, the upper surface stretched between the folding pulleys 55 and 56 and the end pulley 32 serves as a transport belt portion for placing and transporting a transported article. The endless belt 85 is on the surface side that is the upper surface of the conveyor belt portion in a state of being wound around the belt junction conveyor 10 and at both ends in the width direction of the endless belt 85 over the entire length of the endless belt 85 in the traveling direction. A thick edge portion 85a is provided. At this time, if the width between the thick edge portions 85a of the endless belt 85 is W1, and the length W2 of the drive pulley 31, the width W1 between the thick edge portions 85a of the endless belt 85 is the length W2 of the drive pulley 31. As a result, the thick edge 85 a of the endless belt 85 is disposed outside the drive pulley 31. By setting the width of the endless belt 85 in this way, the endless belt 85 to be wound has its thick edge portion 85a regulated by the both ends of the drive pulley 31 in the width direction of the endless belt 85. The meandering of the endless belt 85 that occurs during travel is prevented.

  Next, operation | movement of the belt junction conveyor 10 comprised in this way is demonstrated using FIGS. In these drawings, the endless belt 85 is not stretched for easy understanding of the operations of the main support frame 21 and the sub support frame 22.

  When the belt junction conveyor 10 is in the first transport state, the main support frame 21 and the sub support frame 22 are arranged so that the traveling directions of the endless belts 85 wound around each other are the same, that is, the connecting rod 24. And the connecting rod 25 are positioned so that their axial directions are parallel to each other. When the belt junction conveyor 10 is switched from the first transport state to the second transport state, the drive motor 76 is operated and the timing pulley 77 is rotated in the S direction. Since both ends of the timing belt 80 are fixed to the side surfaces of the rail 53, the timing pulley 77 moves in the U direction when the timing pulley 77 rotates in the S direction. In accordance with this, the drive motor 76 and the main support frame 21 to which the drive motor 76 is attached move in the U direction.

  As described above, since the main support frame 21 is attached to the gear 61 of the interlock mechanism 26 via the connecting rod 24, when the main support frame 21 moves in the U direction, the shaft 67 to which the gear 61 is attached. Is rotated around the center of rotation.

  As the main support frame 21 rotates, the connecting rod 24 also rotates. Since one end of the connecting rod 24 is attached to the gear 61 as described above, the gear 61 rotates in conjunction with the rotation of the connecting rod 24. Along with the rotation of the gear 61, the gears 62 to 66 constituting the interlocking mechanism 26 rotate in a predetermined direction. Since the gear 66 has one end of the connecting rod 25 attached thereto, the connecting rod 25 rotates in the R direction as the gear 66 rotates. Since the connecting rod 25 is attached to the sub-support frame 22, the sub-support frame 22 rotates in a direction (R direction) opposite to the main support frame 21 in conjunction with the rotation of the connecting rod 25. For example, the drive motor 76 is stopped when driven for a predetermined time after being driven. This predetermined time is, for example, a time for rotating the main support frame 21 by 30 °. As a result, the main support frame 21 stops after rotating by 30 ° in the U direction. As the main support frame 21 rotates, the sub-support frame 22 rotates 30 ° in a direction opposite to the rotation direction of the main support frame 21 and stops. Thereby, the belt junction conveyor 10 will be in a 2nd conveyance state.

  When the state of the belt junction conveyor 10 is switched from the second transport state to the first transport state, the timing pulley 77 is rotated in the P direction by the operation of the drive motor 76. As the timing pulley 77 rotates, the timing pulley 77 moves in the R direction. That is, the main support frame 21 to which the drive motor 76 and the drive motor 76 are attached moves in the R direction. Since the main support frame 21 is attached to the gear 61 of the interlock mechanism 26 via the connecting rod 24, when the main support frame 21 moves in the R direction, the shaft 67 to which the gear 61 is attached is rotated. Rotates as the center. In accordance with the rotation of the main support frame 21, the sub support frame 22 rotates through the interlocking mechanism 26. In this case as well, the direction in which the main support frame 21 rotates and the direction in which the sub support frame 22 rotate are opposite to each other. Since the drive motor 76 is driven for a predetermined time and then stopped, the rotation of the main support frame 21 and the sub support frame 22 is stopped. Thereby, the belt junction conveyor 10 will be in a 1st conveyance state.

  When the belt junction conveyor 10 is switched from the first transport state to the third transport state, the drive motor 76 is driven and controlled so that the timing pulley 77 is rotated in the P direction. Further, when the belt junction conveyor 10 is switched from the third transport state to the first transport state, the drive motor 76 may be driven and controlled so that the timing pulley 77 is rotated in the P direction.

  Further, when the belt junction conveyor 10 is switched from the second conveyance state to the third conveyance state, the drive motor 76 is driven and controlled to rotate the timing pulley 77 in the P direction, and the belt junction conveyor 10 is moved from the third conveyance state to the third conveyance state. When switching to the two transport state, the drive motor 76 may be driven and controlled to rotate the timing pulley 77 in the S direction.

  Accordingly, the belt junction conveyor 10 is moved at high speed between the first conveyance state and the second conveyance state, between the first conveyance state and the third conveyance state, and between the second conveyance state and the third conveyance state. Since it can be switched, even when the conveyed product is conveyed at high speed, it can be sorted at high speed and reliably. Further, since the transport direction can be switched by the transport belt portion of the endless belt 85 simply by rotating the main support frame 21 and the sub support frame 22, it is possible to give an impact to the transported object when the transport direction is switched. In addition to being able to prevent, it is possible to prevent the conveyed product from being caught or pulled into the gap generated in the sorting device during sorting, and it is possible to perform stable and reliable sorting of the conveyed product.

  Further, by providing the drive mechanism 27 with respect to the main support frame 21 at a position away from the center of rotation, the drive force required to rotate the main support frame 21 can be reduced, so that the drive motor As a result, it is not necessary to use a device with high output performance.

  In this embodiment, when switching from the first transport state to the second transport state or the third transport state, the angle at which the main support frame 21 and the sub support frame 22 are rotated is set to 30 °. However, the present invention is not limited to this. For example, it may be in the range of 20 to 45 °.

  Moreover, although the case where the conveyed product is sorted into one of the three belt conveyors provided on the downstream side by the belt junction conveyor 10 has been described, the number of belt conveyors used for sorting needs to be limited to three. In addition, the belt junction conveyor 10 of the present invention can be used even when the conveyed product is sorted into three or more belt conveyors. That is, in such a case, it is only necessary to control the rotation angle of the main support frame 21 and the sub support frame 22 by controlling the drive time of the drive motor.

  In this embodiment, the drive mechanism 27 using the drive motor 76, the timing pulley 77, the tension rollers 78 and 79, and the timing belt 80 is taken as an example, but the configuration of the drive mechanism 27 is not limited to this. . For example, as the drive mechanism 27, a drive mechanism 27 using a rack and pinion or a drive mechanism 27 using a linear motor can be used. As shown in FIG. 13, in the case of the drive mechanism 27 using a rack and pinion, a rack having an arc shape centering on the rotation center of the main support frame 21 on the peripheral surface of a rail 53 provided on the base frame 23. 91 and a spur gear (pinion gear) 92 that meshes with the rack 91 may be attached to the drive shaft of the drive motor 93. In this case, the drive motor 93 is attached to the main support frame 21 via the bracket 94. As in the present embodiment, among the both ends in the direction orthogonal to the width direction of the main support frame 21, the connecting rod What is necessary is just to attach the drive motor 94 to the edge part on the opposite side to the end to which 24 is attached, ie, the downstream of the conveyance direction in the conveyance conveyor part of an endless belt.

  As shown in FIG. 14, in the case of the drive mechanism 27 using a linear motor, a plurality of linear motors 96 are provided on the upper surface of the base frame 23 with a predetermined angular pitch interval. Moreover, the metal piece 97 is provided in the edge part on the opposite side to the end to which the connection rod 24 is attached among the both ends in the direction orthogonal to the width direction of the main support frame 21. Since the details are omitted, the linear motor 96 generates a magnetic field between the coils and is generated in the metal piece 97 when the metal piece 97 enters the generated magnetic field. The metal piece 97 is moved in a predetermined direction by repelling or attracting the magnetic force and the magnetic field generated by the linear motor 96. In addition, the permanent magnet may be moved in a predetermined direction by providing a permanent magnet on one or more support frames instead of the metal piece 97 and attracting and repelling the permanent magnet by a magnetic field generated by the linear motor 96. Is possible. The linear motor 96 is arranged at a predetermined angular pitch interval, but may be arranged so that a part of the metal piece 97 enters one of the magnetic fields generated by the linear motor 96. By using a linear motor as the drive mechanism 27, the belt junction conveyor 10 can be easily configured.

  DESCRIPTION OF SYMBOLS 10 ... Belt junction conveyor, 21 ... Main support frame, 22 ... Sub support frame, 23 ... Base frame, 24, 25 ... Connecting rod, 26 ... Interlock mechanism, 27 ... Drive mechanism, 31 ... Drive pulley, 45 ... End pulley, 53 ... Rail, 55, 56 ... Folding roller, 61-66 ... Gear, 67-69 ... Shaft

JP 2005-96988 A No. 8-5143

Claims (5)

A main support frame rotatably attached to a drive pulley that travels an endless belt on which a transport conveyor unit for sorting transported objects is formed;
A sub-support frame on which a tail pulley around which the endless belt is wound is rotatably attached;
The endless belt wound around the drive pulley and the tail pulley on which the main support frame and the sub support frame are placed is placed in the transport direction of the transported object so that the transport conveyor unit is positioned on the upper surface. A base frame to which two folding members to be folded at the upstream side of the conveyor section are attached;
A first connecting rod to which the main support frame is attached to one end side;
A second connecting rod to which the auxiliary support frame is attached to one end side;
The other end side of the first connecting rod and the other end side of the second connecting rod are the rotation centers, and the rotation center of the first connection rod and the rotation center of the second connection rod are The first connecting rod and the second connecting rod are attached so that they coincide with each other, and the first connecting rod and the second connecting rod rotate in opposite directions. An interlocking mechanism for interlocking the connecting rod and the second connecting rod;
The sub-support frame is provided on the downstream side in the transport direction of the transport conveyor unit and rotates the main support frame with the other end side of the first connecting rod as a rotation center, via the interlocking mechanism. A drive mechanism for rotating
A belt junction conveyor characterized by comprising: In the belt junction conveyor of Claim 1,
The interlocking mechanism is provided at a position on the upstream side of the transport conveyor portion of the base frame,
A first gear to which the other end of the first connecting rod is attached;
A second gear attached to the other end of the second connecting rod, coaxial with the first gear and arranged to rotate separately from the first gear;
When the first gear rotates, the rotation direction of the second gear is opposite to the rotation direction of the first gear, and the rotation amount of the second gear is the first gear. A plurality of gears that transmit the rotation of the first gear to the second gear so as to be equal to the amount of rotation of the first gear;
A belt junction conveyor comprising: In the belt junction conveyor according to claim 1 or 2,
The drive mechanism is
A rail provided in the base frame and having an arc shape;
A timing belt having both ends fixed at both ends of the rail;
A pulley around which the timing belt is wound;
A motor fixed to the rotary shaft and attached to the main support frame;
A plurality of pinch rollers for maintaining a constant amount of the timing belt wound around the pulley;
A belt junction conveyor comprising: In the belt junction conveyor according to claim 1 or 2,
The drive mechanism is
A motor with a gear fixed to the rotating shaft and attached to the main support frame;
A rack provided on the base frame and having a tooth surface meshing with the gear formed in an arc shape;
A belt junction conveyor comprising: In the belt junction conveyor according to claim 1 or 2,
The drive mechanism is
A metal piece provided on the main support frame;
A plurality of the base frame, a linear motor that pushes the metal piece inserted through the magnetic field in a predetermined direction by generating a magnetic field during driving;
A belt junction conveyor comprising:

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