JP2012091893A - Sorting conveyor apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sorting conveyer apparatus, in which the falling-off or twisting of a carrying belt is hardly generated, a slanted angle of the carrying belt can be maximized during the sorting operation, and the apparatus is made compact.SOLUTION: The sorting conveyer apparatus includes: a carrying-in end side tail roller 210; a carrying-out end side tail roller 220; a plurality of carrying belts 230a stretched to both tail rollers and wound; and a sorting operation part 3 allowing selective sorting operation of the carrying-out side tail roller by making the carrying-out side tail roller, in parallel, face the carrying-in ends of the plurality of the conveyers juxtaposed on downstream side of the carrying-out side tail roller. The sorting conveyer apparatus carries articles to be carried keeping predetermined spaces by arbitrarily sorting the articles to the carrying-in ends of the plurality of the conveyers juxtaposed on downstream side of the carrying-out ends. A trapezoid belt having a trapezoidal cross section is employed for the carrying belts 230a, and resin rollers with superior slidability, in which trapezoidal grooves 211, 221 corresponding to the shape of the trapezoid belt are formed on the outer periphery surface thereof, are employed for the both tail rollers.

Description

  The present invention relates to a sorting and conveying conveyor device that sorts and distributes articles to be conveyed to a plurality of conveying paths arranged in parallel on the downstream side.

  Conventionally, as a sorting and conveying conveyor that is configured to appropriately distribute and distribute the objects to be conveyed that are conveyed in a row at a predetermined interval on the conveyor to a plurality of conveying paths arranged in parallel on the downstream side, A sorting conveyor device proposed in Japanese Patent Application Laid-Open No. 2006-21916 is known.

  The proposed distribution conveyor device is configured by winding a plurality of round belts in parallel on a conveyor frame, and when the other end of the conveyor frame is swung horizontally with one end in the machine length direction as a fulcrum, The conveyor frame is deformed into a parallelogram shape in plan view.

  In other words, the conveyor frame is configured such that at least the upper end portions in the machine length direction of the left and right frames formed in a rectangular shape are connected so as to be deformable via grooved tail rollers. A grooved drive pulley driven by a motor is disposed between the left and right frames, and a round belt is wound around the grooved drive pulley and the grooved tail roller.

  In addition, the conveyor frame is pivotally supported at one end in the machine direction on the gantry and supported at the other end so that it can swing horizontally, and the conveyor frame is transformed into a parallelogram by the swinging means. Following this, the plurality of round belts also swing in parallel while maintaining a distance so that the round belts can run stably.

  In other words, by configuring the conveyor frame as a parallelogram link, even if the conveyor frame is swung left and right and deformed into a parallelogram shape, the axis of the roller supporting the round belt at both ends in the machine direction is parallel. Thus, it is possible to maintain a parallel state with respect to the edges of the transfer conveyor disposed before and after the sorting conveyor device.

JP 2006-21916 A

  By the way, in the proposed sorting conveyor, the left and right frames and the tail rollers at the front and rear ends are rotatably connected to form a parallelogram link. Therefore, when the left and right frames are swung, The tail roller shaft core moves to the left and right while maintaining its parallelism.If the front and rear tail rollers are relatively displaced to the left and right, the tail rollers are wound around the tail rollers. Each of the round belts is obliquely engaged with the grooves formed on the tail rollers of the two round rollers. That is, the round belt comes into contact with the inner surface on the oblique direction side with respect to the inner surface of the groove portion at the entrance and exit of the groove portion. For this reason, when the round belt is driven to turn in the piece-contact state, the round belt may get over the groove and fall off. Even if the drop does not occur, the torsional force acts on the part of the round belt that comes into contact with the groove, and the torsion is generated. As a result, the to-be-conveyed article is displaced due to the torsion. There was a case. And the deviation | shift of the conveyance article by the said twist becomes so notably remarkable that the skewing angle of a round belt is large. In other words, if it is attempted to suppress the deviation of the conveyed article by reducing the skew angle, the length of the machine must be set inevitably, so that it is difficult to make the apparatus compact and increase the size.

  The present invention has been made in view of the problems as described above, and an object of the present invention is to make it difficult for the conveyor belt to drop off or twist, and to increase the skew angle as much as possible. An object of the present invention is to provide a sorting / conveying conveyor device that can be made simple.

  To achieve the above object, according to the present invention, a carry-in end tail roller, a carry-out end tail roller, a plurality of carry belts wound around the tail rollers, and the carry-out side A sorting operation unit configured to selectively sort and operate the tail roller in parallel toward the loading ends of a plurality of conveyance paths arranged in parallel on the downstream side of the tail roller, In a sorting / conveying conveyor apparatus that sorts and conveys appropriately to the carrying-in ends of a plurality of conveying paths arranged in parallel on the downstream side of the carrying-out end, a trapezoidal belt having a trapezoidal cross section is adopted as the carrying belt. The tail rollers are made of resin and have a trapezoidal groove corresponding to the shape of the trapezoidal belt on the outer peripheral surface thereof.

  Here, the trapezoidal groove of the tail roller is formed such that the inner surface on the bottom side is inclined to the groove width contacting the trapezoidal belt in accordance with the shape of the trapezoidal belt, while the inner surface on the opening side is It can be configured to be formed on an inclined surface or a curved surface separated from the side surface of the trapezoidal belt.

  The sorting operation unit rotatably supports the carry-out side tail roller, and is provided with a movable frame provided so as to be capable of reciprocating linear movement along the rotation axis direction of the carry-out side tail roller, and the movable frame. A fixed frame that is reciprocally supported so as to be linearly movable; and an operating mechanism that is interposed between the fixed frame and the movable frame to operate the movable frame. The movable belt is hung around the movable frame. A tension roller that maintains the tension of the belt at a predetermined value is attached in the vicinity of the carry-out tail roller, and the trapezoidal groove is formed in the tension roller.

  According to the sorting and conveying conveyor device of the present invention according to the above configuration, a trapezoidal belt having a trapezoidal cross section is adopted for the conveying belt, and both tail rollers on the carry-in side and the carry-out side on which the trapezoidal belt is wound, The tension roller is formed with a trapezoidal groove corresponding to the cross-sectional shape of the trapezoidal belt, and the trapezoidal belt is inserted into and engaged with the trapezoidal groove, so that the trapezoidal belt is given a predetermined tension. When it is swiveled, the wedge effect fits into the trapezoidal groove and bites in, so that the trapezoidal belt is prevented from dropping out of the trapezoidal groove as much as possible. At the part where the belt enters and exits the trapezoidal groove, the belt reliably abuts both inner surfaces of the trapezoidal groove, and no contact with one inner surface occurs. A rotational force that causes twisting by rolling does not work. For this reason, it becomes possible to prevent the trapezoidal belt from being twisted, and thus to prevent the conveyance article from being displaced as much as possible.

  In addition, the trapezoidal belt is prevented from falling off and twisting as much as possible even if the skew angle of the conveyor belt increases based on the relative lateral displacement of the carry-in tail roller and the carry-out tail roller. Therefore, the transport length (machine length) of the sorting transport conveyor can be shortened as much as possible, and the apparatus can be made compact.

  Further, the trapezoidal groove is formed such that the inner surface on the bottom side thereof is inclined so as to be in contact with the trapezoidal belt in accordance with the shape of the side surface of the trapezoidal belt, while the inner surface on the opening side thereof is If the structure is formed on an inclined surface or a curved surface that is separated from each other, the contact area between the inner surface of the groove and the belt side surface can be reduced, and the frictional resistance can be reduced, so that the belt crawls along the inner surface of the groove. Even if it tries to rise, it will slip and fall, and the dropout can be prevented as much as possible. Further, the belt is guided to a normal position by the inclination of the upper portion of the groove.

It is a top view which shows the whole structure of the distribution conveyance conveyor apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the distribution conveyor part of the distribution conveyance conveyor apparatus shown in FIG. It is the top view which expanded and showed the carry-out side tail roller part of the distribution conveyor part. It is the side view which expanded and showed the carrying-out side tail roller part of the distribution conveyor part. It is the top view which expanded and showed the distribution operation | movement part. It is the reverse view which looked at the carrying-out end position switching operation mechanism of the distribution operation part from the back surface side of FIG. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. FIG. 7 is a cross-sectional view taken along line IIX-IIX in FIG. 6. FIG. 7 is a cross-sectional view taken along line IX-IX in FIG. 6. FIG. 2A is a sectional view taken along the longitudinal direction, and FIG. 2B is a sectional view taken along the line bb in FIG. 2A. The figure and the figure (c) are the expanded views of the cam groove shown in the figure (a). FIG. 3 is an enlarged cross-sectional view of a main part showing an enlarged cross section of the conveyance belt and a groove cross section engaged with the conveyance belt. It is a principal part expanded sectional view which shows the deformation | transformation embodiment of the groove | channel cross section in FIG. It is a front which shows the belt guide arrange | positioned by the engagement insertion side with the groove part of a conveyance belt and the tail roller of a drive side.

  Hereinafter, preferred embodiments of the sorting and conveying conveyor apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view showing the overall configuration of the sorting and conveying conveyor device in the present embodiment. As shown in the drawing, the sorting and conveying conveyor device 1 sorts articles w supplied at a predetermined interval to the carry-in end to a plurality of conveyers A1 to A4 arranged in parallel on the downstream side of the carry-out end. A distribution conveyor unit 2 and a distribution operation unit 3 that performs a distribution operation with the carry-out end side of the distribution conveyer unit 2 toward the carry-in ends of the downstream transfer conveyors A1 to A4. Prepare.

  As shown in the longitudinal sectional view of FIG. 2, the sorting / conveying conveyor unit 2 includes a tail roller 210 provided at a carry-in end on one end side of the sorting / conveying conveyor unit 2 and a carry-out end on the other end side. The tail roller 220 provided, the plurality of conveyor belts 230 wound around the tail rollers 210 and 220, and the carry-out tail roller 220 are rotatably supported, and the carry-out tail is also supported. A movable frame 240 provided so as to be capable of reciprocating linear movement along the rotation axis direction of the roller 220, and provided near the carry-out side tail roller 220 attached to the movable frame 240, and the conveyor belt 230 is wrapped around. The tension roller 250 keeps the tension of the conveyor belt 230 at a predetermined value. Here, in the carry-in side tail roller 210, the carry-out side tail roller 220, and the tension roller 250, groove portions for engaging and inserting the conveyance belt 230 are formed in the outer peripheral surfaces thereof.

  In addition, a rotation shaft 211 is integrally attached to the carry-in tail roller 210 at the shaft core portion, and the rotation shaft 211 extends to the side portion along the conveyance direction of the article w. Is supported by the machine casing 4. That is, the rotating shaft 211 is inserted into a support cylinder 212 that is fixedly locked through the machine casing 4, and is rotatably supported by the support cylinder 212. The rotating shaft 211 is inserted into the support tube 212 and has one end portion extending laterally. The extended end 211 a is further rotatably supported by a support frame 213 assembled to the machine frame 4. . A pulley 214 is fixed to the extending portion of the rotating shaft 211, and is rotated by a drive motor (not shown) provided below the drive belt 215 wound around the pulley 214. It is designed to be driven.

  The carry-out side tail roller 220 is attached to the movable frame 240. The movable frame 240 also constitutes a part of the sorting operation unit 3. The sorting operation unit 3 will be described in detail later.

  That is, FIG. 3 is an enlarged plan view showing the carry-out side tail roller 220 portion of the sorting and conveying conveyor section 2, and FIG. 4 is an enlarged side view showing the carry-out side tail roller 220 portion. However, as shown in the drawings, the carry-out tail roller 220 is attached to a support shaft 242 that is erected and fixed to an end plate 240 a of the movable frame 240 via a support arm 243. The support arms 243 are provided as a pair at both end portions of the carry-out side tail roller 220 and rotatably support the shaft portion of the carry-out side tail roller 220.

  Further, a fixing bolt 242a for fixing the support arm 243 is screwed onto the shaft end surface of the support shaft 242, and by loosening the fastening force of the fixing bolt 242a, the carry-out end side tail roller is moved together with the support arm 243. 220 can be swung upwardly. Then, the carry-out side tail roller 220 is swung upward and moved up so that maintenance work such as attachment / detachment / replacement of the conveyor belt 230 can be easily performed.

  A guide roller 260 for guiding the return side portion of the annular conveying belt 230 is rotatably attached to the end plate 240 a of the movable frame 240 via a support shaft 261. Here, in this illustrated example, a bracket 262 is integrally provided on the lower side surface of the end portion of the end plate 240a on the side opposite to the unloading end, and the bracket 262 is provided integrally with the bracket 262. It is fixed upright and its axial center position is below the carry-out tail roller 220 (see FIG. 4). That is, as shown in FIG. 2, the guide roller 260 is positioned below the return side portion of the conveyor belt 230 and abuts to push it up.

  As shown in FIGS. 3 and 4, a tension roller 250 is attached to the end plate 240 a of the movable frame 240 via a swing arm 251. Here, the swing arm 251 is divided into a base end side swing arm 251a and a swing end side swing arm 251b, and these two arms 251a and 251b are connected by bolt fixing and integrated. Has been. The base end portion of the integrated swing arm 51 is fixedly attached to a rotating shaft 621 that passes through the end plate 240a and is rotatably supported by the end plate 240a. Further, the rotation shaft 621 is rotatably supported with respect to the end plate 240a at a position substantially coaxial with the axis of the carry-out tail roller 220. The rotating shaft 621 is a constituent member of the swing operation mechanism 620 described in detail later.

  Further, as shown in FIG. 4, the base end side swing arm 251a extends obliquely downward from the rotating shaft 621, and the swing end side swing arm 251b is attached to the extended end. The swing end side swing arm 251b extends substantially horizontally and reaches the vicinity of the guide roller 260, and a support shaft 252 that rotatably supports the tension roller 250 is erected and fixed to the extended end. The tension roller 250 has a cylindrical shape. The support shaft 252 is inserted into the tension roller 250 and is rotatably supported on the outer side of the support shaft 252.

  Further, as shown in FIGS. 1 and 2, a holding roller group 231 is provided between the conveyance side portion and the return side portion of the conveyance belt 230 to prevent the conveyance side portion from slacking downward. It has been. In the illustrated example, the holding roller group 231 includes seven rollers 231a. Each roller 231a is housed in a rectangular frame 232 and is rotatably supported by the roller 231a. The frame 232 is fixedly supported on the machine frame 4 via a pair of support stays 233.

  As shown in FIG. 1, an article supply device 5 is provided on the upstream side of the carry-in tail roller 210 to supply the article w to be conveyed onto the carry belt 230 wound around the carry-in tail roller 210. It has been. Here, in this embodiment, the article supply apparatus 5 cuts the ham from the raw ham into a predetermined thickness, overlaps the cut ham slices by a predetermined number, and sends out the ham slicer apparatus as a transported article w. 501. The ham slicer device 501 is configured by arranging two ham slicers 501a and 501b side by side, and each ham slicer 501a and 501b functions as a buffer when supplying ham raw wood. Yes. That is, the ham slicers 501a and 501b are horizontally moved as needed when the ham raw wood is replaced and supplied, and the carry-out ends thereof face the carry-in tail roller 210 and are aligned.

  FIG. 5 is an enlarged plan view showing the sorting operation unit 3. The sorting operation unit 3 forms a carry-out end position switching mechanism, and includes the above-described movable frame 240. The movable frame 240 reciprocates linearly along the rotation axis direction of the carry-out tail roller 220. As a result, the carry-out tail roller 220 is selectively opposed to each of a plurality of conveyance paths arranged in parallel on the downstream side thereof, that is, the carry-in ends of the plurality of conveyance conveyors A1 to A4, and parallel to the predetermined position. It is designed to stop after positioning.

  6 is a view of the carry-out end position switching mechanism of the sorting operation unit 3 as viewed from the back side of FIG. 5, and FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. That is, as shown in FIGS. 5 to 7, the sorting operation unit 3 includes the movable frame 240, a fixed frame 320 that supports the movable frame 240 in a reciprocating linearly movable manner, and the fixed frame 320 and the movable frame. And an actuating mechanism 340 that is interposed between the actuating frame 240 and reciprocally linearly operates the movable frame 240.

  The movable frame 240 includes an end plate 240a extending in the transport direction, two slide rods 240b each having one end fixed to a portion near the counter-carrying end side of the end plate 240a and a substantially central portion in the longitudinal direction. 240b and an end plate 240c provided between the other ends of the slide rods 240b and 240b, and is formed in a substantially rectangular shape. Further, on the end plate 240c side, a flat plate 245 extending from the end plate 240c side to the end plate side over a predetermined length is fixed on the upper side across the slide rods 240b and 240b. Is provided.

  The fixed frame 320 includes a fixed substrate 321 and a presser plate 322 that are clamped and fixed to the side plate 401 with, for example, bolts or the like with both sides of the side plate 401 forming the machine frame 4 interposed therebetween. Two through holes 323 through which the slide rods 240 b and 240 b are inserted are concentrically formed in the fixed substrate 321, the holding plate 322, and the side plate 401 of the machine frame 4.

  The fixed frame 320 has a support plate 324 that is integrally fixed to the fixed substrate 321 and extends to the side of the machine frame 4. The support plate 324 faces the side opposite to the above-described conveyor. It extends. A pair of reinforcing plates 325 are attached to the support plate 324 so as to be integrally raised on both side portions along the extending direction.

  8 is a cross-sectional view taken along the line IIX-IIX in FIG. 6, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 6. As shown in FIG. 8 and FIG. A pair of linear guides 326 extending along the extending direction of the slide rods 240b and 240b are interposed between the lower surface of the support plate 324 of the fixed frame 320 and the upper surface of the flat plate 245 of the movable frame 240. Is provided. That is, the fixed frame side member 326a of the linear guide 326 is suspended and integrally fixed to the lower surface of the support plate 324, while the movable frame side member 326b of the linear guide 326 is integrally fixed to the upper surface of the flat plate 245. Has been. That is, the movable frame 240 is supported by being suspended from the support plate 324 side while being guided by the linear guide 326 so as to be reciprocally linearly movable.

  Further, on the lower surface side of the support plate 324, a driving pulley 342 that is positioned in the vicinity of the end portion on the extending end side and that forms the operating mechanism 340 and a driving motor 343 that rotates the driving pulley 342 forward and backward are provided. The drive pulley 342 is disposed at a position corresponding to the center portion between the slide rods 243 and 243. A driven pulley 344 that is paired with the drive pulley 342 is attached to the lower surface of the support plate 324 via a support stay 345 in the vicinity of the side plate 401 of the machine frame 4. A timing belt 346 is wound around the pulley 342 and the driven pulley 344.

  In addition, a predetermined portion of the timing belt 346 is fixedly mounted on the flat plate 245 of the movable frame 240 by being sandwiched vertically by a pair of upper and lower mounting plates 246. For this reason, when the drive motor 343 is rotated forward and backward by a predetermined rotation amount, the movable frame 240 is reciprocated linearly by a predetermined stroke. Accordingly, when the movable frame 240 is reciprocated linearly, the carry-out side tail roller 220 of the sorting / conveying conveyor unit 2 moves along the direction of the rotation axis, as shown in phantom lines in FIG. It will reciprocate linearly.

  The drive motor 343 is operated and controlled by a control unit (not shown), and the rotation amount of the drive motor 343 corresponds to the carry-in end of the conveyors A1 to A4 indicated by phantom lines in FIG. By controlling according to the position, the carry-out tail roller 220 is positioned and stopped at a predetermined carry-out end position facing the carry-in ends of the transport conveyors A1 to A4.

  Here, as described above, when the carry-out tail roller 220 is reciprocated linearly along the direction of the rotation axis, the transfer length of the sorting transfer conveyor unit 2 corresponds to the reciprocating linear movement amount. Change will occur. That is, with the change of the carry-out end position of the carry-out tail roller 220, the amount of looseness (tension) of the carry belt 230 changes.

  Therefore, in this embodiment, as shown in FIGS. 1, 5, 6, and 8 to 10, the slack of the conveyor belt 230 that changes as the carry-out end position of the carry-out tail roller 220 changes. Depending on the amount (tension), the position of the tension roller 210 described above is switched, thereby providing tension roller position switching means 6 that keeps the tension of the conveyor belt 230 at a predetermined value.

  That is, the tension roller position switching means 6 includes a swing arm 251 that is integrally attached to the movable frame 240 by pivotally supporting the tension roller 210 so as to swing up and down, and swinging the swing arm 251. And a rocking operation mechanism 620 to be moved.

  Here, in the embodiment of one aspect in this illustrated example, the swing operation mechanism 620 is integrally and coaxially attached to the swing axis of the swing arm 251, and the end plate of the movable frame 240. A rotating shaft 621 that reciprocates linearly together with the rotating shaft 241 and a cam mechanism 640 that swings and rotates the rotating shaft 621 in the forward and reverse directions as the rotating shaft 621 reciprocates linearly. ing.

  The rotating shaft 621 passes through the end plate 241 of the movable frame 240, and is supported by the end plate 241 so as to be slidably rotatable while being restricted in relative movement in the axial direction. The rotating shaft 621 further extends along the side of the fixed frame 320 through the fixed substrate 321 and the pressing plate 322 of the fixed frame 320 and the side plate 401 of the machine frame 4. The extended length is set to be equal to or greater than the reciprocating stroke value of the movable frame 240.

  In addition, the fixed frame 320 is provided with a guide cylinder 622 that rotatably supports the rotating shaft 621 and guides the reciprocating linear movement in the longitudinal direction thereof. Here, the tube length of the guide tube 622 is shorter than the shaft length of the rotating shaft 621, and the rotating shaft 621 projects through the guide tube 622. One end of the guide tube 622 is fixedly attached to the fixed substrate 321 of the fixed frame 320 via the bearing member 623, and the other end is fixedly supported by the reinforcing plate 325 of the fixed frame 320 and is suspended downward. The mounting and fixing plate 624 is mounted and fixed via a bearing member 623.

  On the other hand, the cam mechanism 640 has a cam follower 642 provided so as to protrude from the outer peripheral portion of the rotating shaft 621, and has an overall length larger than the moving stroke length of the rotating shaft 621 and faces the outer peripheral surface of the rotating shaft. The groove cam member 644 is provided. A portion of the groove cam member 644 facing the rotation shaft 621 is formed as a concave arc surface having the same center as the rotation shaft 621, and the cam groove 646 for engaging the cam follower 642 with the arc surface. Are engraved. Here, the groove cam member 644 is bolted and fixed to the outer peripheral surfaces of the two bearing members 623 and 623 provided at both ends thereof. As shown in FIGS. 10A and 10B, the guide tube 622 and the groove cam member 644 are connected to each other in the longitudinal direction so that their strengths are mutually supplemented. It is desirable to provide the member 645. The connecting reinforcing member 645 in the illustrated example has a C-shaped ring shape in which a notch is formed in a part in the circumferential direction, and the notch can interfere with the cam follower 642. I try to prevent it.

  FIG. 10C is a development view of the cam groove 646. As shown in the figure, the cam groove 646 extends along the axial length direction, and the cam groove length corresponds to the moving stroke of the cam follower 642 in the axial length direction (= moving stroke of the movable frame). The cam groove 646 is smoothly lifted and displaced in the circumferential direction according to the amount of displacement in the axial length direction, and the amount of lift displacement becomes the amount of forward / reverse oscillating rotation of the rotating shaft 621. The forward / reverse rotation amount of the rotary shaft 621 becomes the swing angle amount of the swing arm 251, which is on the swing end side of the swing arm 251, as indicated by the phantom line in FIG. 2. The attached tension roller 250 is swung up and down. That is, by forming the cam lift curve of the cam groove 646 according to the amount of looseness (tension) of the conveyor belt that changes with the change of the unloading end position of the unloading tail roller 220, the tension of the conveyor belt 230 is set to a predetermined value. Will be able to keep the value. The guide tube 622 is formed with an insertion groove 622a of the cam follower 642 having a larger opening according to the shape of the cam groove.

  Further, in the above-described embodiment, the cam mechanism 640 is adopted as the swing operation mechanism 620, and the tension roller 250 is swung up and down via the swing arm 251 by the cam machine 640. The tension roller 250 may be oscillated by employing a servo motor instead of the cam mechanism.

  By the way, as described above, when the carry-out side tail roller 220 is reciprocated linearly along the direction of the rotation axis thereof and displaced to the left and right relative to the carry-in side tail roller 210, the carry belt 230 is skewed between the carry-in tail roller 210 and the carry-out tail roller 220. For this reason, if a conventional round belt is used for the conveyor belt 230 and the belt groove is also formed corresponding to the round belt, dropping or twisting may occur.

  Therefore, in the present invention, as shown in the enlarged cross-sectional view of the main part in FIG. 11, the conveyor belt 230 employs a trapezoidal belt 230 a having a trapezoidal cross-sectional shape, and correspondingly. The tail rollers 210 and 220 and the tension roller 250 on the carry-out side and the carry-in side have trapezoidal grooves 211, 221, and 251 corresponding to the shape of the trapezoidal belt 230a on the outer peripheral surface thereof, so that the slipperiness is good. The one made of resin is adopted. Moreover, polyacetal etc. are suitable as this resin material.

  Here, the trapezoidal grooves 211, 221, and 250 of the tail rollers 210 and 220 and the tension roller 250 have the inner side surfaces 211 a, 221 a, and 251 a on the bottom side of the trapezoidal belt 230 a with a predetermined depth da. In accordance with the shape, the trapezoidal belt 230a is formed so as to have a groove width in which both inner side surfaces 211a, 221a, 251a abut, while the inner side surfaces 211b, 221b, 251b on the opening side have a predetermined depth db. It is formed on an inclined surface that is spaced from both side surfaces of the trapezoidal belt 230a. That is, the inner side surfaces 211b, 221b, and 251b on the opening side are formed on the inclined surfaces that are separated from the both side surfaces of the trapezoidal belt 230a in this way, so that the opening width of each groove is increased and the trapezoidal groove 211 of the trapezoidal belt 230a , 221, 251 can be easily inserted, and the inner side surfaces 211b, 221b, 251b on the opening side can be slid to be surely guided between the inner side surfaces 211a, 221a, 251a on the bottom side by the wedge effect. The trapezoidal grooves 211, 211, and 250 are firmly fitted and fitted.

  FIG. 12 is an enlarged cross-sectional view of the main part showing a modified embodiment of the trapezoidal grooves 211, 221, 251 formed in the carry-in and carry-out tail rollers 210, 220 and the tension roller 250 in a recessed manner. The inner side surfaces 211b, 221b, and 251b on the opening side may be formed on curved surfaces that protrude toward the inside of the groove, as shown in FIG. Further, although not shown, the trapezoidal grooves 211, 221, 251 are formed as a single inclined surface by extending the bottom side inner surface thereof to 211a, 221a, 251a through the entire depth of the groove to the opening. It may be.

  FIG. 13 shows a belt guide 270 for guiding the trapezoidal belt 230a to the engaging insertion side of the driving tail roller. As shown in the figure, the belt guide 270 includes a support stay 271 bent in an L-shape and seven guide rollers 272 erected and fixed to a bent piece 271 a of the support stay 271. The guide roller 272 is rotatably supported on the bent piece via a support shaft 273 at a predetermined pitch in accordance with the belt width of the trapezoid belt 230a, and the trapezoid belt 230a is inserted between the guide rollers 272 and 272. The belt guide 270 is arranged on the engagement insertion side so as to face the tail roller on the driving side. That is, in the illustrated embodiment, as shown in FIGS. 1 and 2, the carry-in tail roller 210 is a drive-side tail roller that is rotationally driven by a drive motor (not shown). The guide 270 is fixedly disposed in the vicinity of the carry-in tail roller 210 so as to face it, and guides the return side portion of the transport belt 230 (trapezoidal belt 230a) into the trapezoidal groove of the carry-in tail roller 210. ing. By providing the belt guide 270, the trapezoidal belt 230 that returns obliquely is prevented from getting on the outside of the trapezoidal groove.

DESCRIPTION OF SYMBOLS 1 Sorting conveyance conveyor apparatus 2 Sorting conveyance conveyor part 3 Sorting operation part 210 Carry-in end side tail roller 211 Trapezoidal groove 211a Bottom side inner surface 211b Opening side inner side 220 Carrying end side tail roller 221 Trapezoidal groove 221a Bottom side inner side 221b Opening side inner surface 230 Conveying belt 230a Trapezoid belt 240 Movable frame 250 Tension roller 251 Trapezoidal groove 251a Inner side surface 251b on the bottom side Opening side inner surface 320 Fixed frame 340 Actuating mechanism w Conveying articles A1 to A4 Conveying conveyor (downstream conveying path)

Claims (3)

A carry-in end tail roller, a carry-out end tail roller, a plurality of conveyor belts wound around the tail rollers, and a plurality of carry-out tail rollers arranged in parallel on the downstream side And a sorting operation section that selectively performs sorting operations in parallel to the loading end of the conveying path, and a plurality of articles that are conveyed at a predetermined interval on the downstream side of the carrying-out end. A sorting and conveying conveyor device that sorts and conveys appropriately to the carry-in end of the conveying path,
For the conveyor belt, a trapezoidal belt having a trapezoidal cross section is adopted,
The tail rollers are made of resin in which a trapezoidal groove corresponding to the shape of the trapezoidal belt is formed on the outer peripheral surface thereof.
A sorting and conveying conveyor device characterized by that. The trapezoidal groove of the tail roller is formed such that the inner surface on the bottom side thereof is inclined to the groove width contacting the trapezoidal belt corresponding to the shape of the trapezoidal belt, while the inner surface on the opening side of the trapezoidal belt is It is formed on an inclined surface or curved surface separated from the side surface,
The sorting and conveying conveyor device according to claim 1. The sorting operation unit is
A movable frame that rotatably supports the carry-out side tail roller, and that can be moved back and forth along the axis of rotation of the carry-out side tail roller.
A fixed frame that supports the movable frame so as to be capable of reciprocating linear movement;
An operating mechanism that is interposed between the fixed frame and the movable frame to operate the movable frame;
A tension roller is attached to the movable frame in the vicinity of the carry-out tail roller, and the trapezoidal groove is formed in the tension roller. ing,
The sorting and conveying conveyor device according to claim 1, wherein the sorting and conveying conveyor device is provided.

Images