JP2012091892A - Sorting conveyor apparatus - Google Patents

Abstract

A gap between a carry-out end of a sorting transport conveyor and a carry-in end of a plurality of transport paths provided downstream thereof is kept as small as possible regardless of the sorting movement distance.
A conveyor device that distributes articles w to conveyance conveyors A1 to A4 arranged in parallel at a carry-out end, and a plurality of transfer belts 230 wound between tail rollers 210 and 220 provided at the carry-in end and the carry-out end. A movable frame 240 that rotatably supports the carry-out tail roller and reciprocally moves linearly along the direction of the rotation axis, and moves the movable frame to move the carry-out tail roller to the plurality of conveyance paths. A carry-out end position switching operation mechanism 340 that faces and stops parallel to the carry-in end, a tension roller 250 that keeps the tension of the belt at a predetermined value by being wound around the carry belt, and a change in the carry-out end position Tension roller position switching means 6 that switches the position of the tension roller in accordance with the amount of looseness of the conveyor belt that changes.
[Selection] Figure 1

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

  However, 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 left and right while maintaining its parallelism, but the movement trajectory of the tail roller inevitably has an arc shape.

  For this reason, in consideration of the circular arc trajectory when the tail roller is moved, the relative positional relationship between the tail roller and the downstream conveyor carry-in end must be determined so as not to interfere with each other. That is, if the carry-in end position of the transport conveyor on the downstream side is set avoiding the interference with the parallel swinging tail roller, the transfer part between the tail roller and the carry-in end of the transport conveyor is inevitably somewhat large. It becomes necessary to make a gap. The size of the gap changes depending on the length of the left and right frames, that is, the length of the machine. The shorter the length of the machine, the larger the gap. For this reason, there is also a problem that it is difficult to make the apparatus compact by shortening the captain.

  The present invention has been made in view of the problems as described above, and its purpose is to make the carry-out end of the sorting conveyor face parallel to the carry-in ends of a plurality of conveyance paths arranged in parallel on the downstream side. The position of the tension roller can be changed according to the amount of looseness (tension) of the conveyor belt that changes with the switching movement of the carry-out end position. Is to provide a sorting and conveying conveyor device that can keep the tension of the conveying belt at a predetermined value.

  In order to achieve the above object, according to the present invention, there is provided a sorting and conveying conveyor device that sorts and conveys articles supplied at a predetermined interval to the carry-in end to a plurality of carrying paths arranged in parallel on the downstream side of the carry-out end. A tail roller provided at the carry-in end, a tail roller provided at the carry-out end, a plurality of conveyor belts wound around the tail rollers, and the carry-out tail roller. A movable frame that is rotatably supported and reciprocally linearly movable along the direction of the rotation axis of the carry-out tail roller, and the movable frame is moved to move the carry-out tail roller to the plurality of transports. A sorting operation section that is selectively opposed to each of the loading ends of the road, is positioned in parallel and stopped at a predetermined position, and is provided in the vicinity of the carry-out side tail roller attached to the movable frame. Both the tension roller that keeps the tension of the belt at a predetermined value when the conveyor belt is wound around, and the tension according to the amount of looseness of the conveyor belt that changes as the unloading end position is switched by the sorting operation unit. Tension roller position switching means for switching the position of the roller.

  Here, the distribution operation unit includes a fixed frame that supports the movable frame so as to be capable of reciprocating linear movement, and an operation mechanism that is interposed between the fixed frame and the movable frame to operate the movable frame, The tension roller position switching means includes a swing arm attached to the movable frame by pivotally supporting the tension roller so as to swing up and down, and a swing operation mechanism for swinging the swing arm. The swing operating mechanism is coaxially and integrally attached to the swing axis of the swing arm and extends longer than the reciprocating stroke of the movable frame, and faces the rotary shaft. And a cam mechanism that is attached to the fixed frame, engages with the rotating shaft, and rotates the rotating shaft in accordance with the reciprocating movement of the rotating shaft.

  The cam mechanism includes a cam follower attached to the outer peripheral surface of the rotating shaft and an arc shape provided with a length corresponding to the entire length of the rotating shaft and facing the outer peripheral surface of the rotating shaft. And a cam groove formed along the longitudinal direction of the cam member and engaged with the cam follower.

  According to the sorting / conveying device of the present invention according to the above-described configuration, the carry-out end tail roller of the sorting / conveying conveyor is reciprocated linearly along the rotation axis thereof, and is arranged in parallel on the downstream side of the sorting / conveying conveyor. It is possible to position and stop at each of the carry-in ends of the plurality of transport paths that are switched in parallel while facing each other, and to stop at a predetermined position. It is possible to make the gap generated at the transition portion between each carry-in end as small as possible while keeping the gap constant in relation to the moving distance.

  In addition, the tension of the conveyor belt can be maintained at a predetermined value by switching the position of the tension roller in accordance with the amount of looseness (tension) of the conveyor belt that changes with the switching of the unloading end position of the unloading tail roller.

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).

  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.

  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. 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 the illustrated example, a bracket 262 is integrally provided on the lower side surface of the end portion of the end plate 240a1 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 251 is fixedly attached to a rotary 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 operation mechanism 340 that is interposed between the movable frame 240 and the movable frame 240 to reciprocate linearly to switch the carry-out end position.

  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 the present invention, as shown in FIGS. 1, 5, 6, and 8 to 10, the amount of looseness of the conveyor belt 230 that changes as the unloading end position of the unloading tail roller 220 changes. According to (tension), the position of the tension roller 250 described above is switched, and thereby tension roller position switching means 6 is provided so as to keep 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 pivotally supported by the tension roller 250 so as to swing up and down and is integrally attached to the movable frame 240, and swings 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.

DESCRIPTION OF SYMBOLS 1 Sorting conveyance conveyor apparatus 2 Sorting conveyance conveyor part 3 Sorting operation part 4 Machine frame 6 Tension roller position switching means 210 Carry-in side tail roller 220 Carry-out side tail roller 230 Conveying belt 240 Movable frame 250 Tension roller 251 Swing arm 320 Fixed Frame 340 Actuating mechanism 620 Swing actuating mechanism 621 Rotating shaft 640 Cam mechanism 642 Cam follower 644 Groove cam member 646 Cam groove w Conveyed articles A1 to A4 Conveyor (downstream conveying path)

Claims (3)

A sorting and conveying conveyor device that sorts and conveys articles supplied at a predetermined interval to the carry-in end to a plurality of carrying paths arranged in parallel on the downstream side of the carry-out end,
A tail roller provided at the carry-in end;
A tail roller provided at the carry-out end;
A plurality of conveyor belts wound around and wound between the tail rollers;
A movable frame that rotatably supports the carry-out side tail roller and is capable of reciprocating linear movement along the rotation axis direction of the carry-out side tail roller;
A sorting operation unit that moves the movable frame and selectively positions the carry-out side tail roller opposite to the carry-in ends of the plurality of conveyance paths so as to be positioned in parallel and stopped at a predetermined position;
A tension roller attached to the movable frame and provided in the vicinity of the carry-out tail roller, and a tension roller around which the conveyor belt is wound to keep the tension of the belt at a predetermined value;
Tension roller position switching means for switching the position of the tension roller in accordance with the amount of looseness of the conveyor belt that changes with the switching of the carry-out end position by the sorting operation unit;
A sorting and conveying conveyor device comprising: The sorting operation unit includes a fixed frame that supports the movable frame so as to be capable of reciprocating linear movement, and an operation mechanism that is interposed between the fixed frame and the movable frame to operate the movable frame,
The tension roller position switching means includes a swing arm attached to the movable frame by pivotally supporting the tension roller so as to swing up and down, and a swing operation mechanism for swinging the swing arm. ,
The swing operation mechanism includes a rotary shaft that is coaxially and integrally attached to the swing axis of the swing arm and extends longer than a reciprocating stroke of the movable frame, and faces the rotary shaft. A cam mechanism that is attached to the fixed frame, engages with the rotation shaft, and rotates the rotation shaft as the rotation shaft reciprocates;
The sorting and conveying conveyor device according to claim 1. The cam mechanism is
A cam follower attached to the outer peripheral surface of the rotating shaft;
An arcuate cam member having a length corresponding to the entire length of the rotating shaft and provided facing the outer peripheral surface of the rotating shaft;
A cam groove formed along the longitudinal direction of the cam member and engaged with the cam follower.
The sorting and conveying conveyor device according to claim 2.

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