JP2010042905A - Transfer device in overhead-type transport apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer device which can space-efficiently receive a workpiece hanging from a continuously transporting movable member and passes the workpiece to another transport path without stopping the movable member and can transfer the workpiece without being equipped with a special control device. <P>SOLUTION: The transfer device comprises: crawler chains 3, 4 which mesh with at least one of first and second drive chains C1, C2 which provide a driving force for first and second movable members 1, 2 moving along first and second transport rails L1, L2; a fixed sprocket and a straining sprocket supporting the crawler chains; gear groups 5, 6 working in engagement with the fixed sprocket; a spindle 7 horizontally rotating in engagement with the final gears 51, 61 of the gear groups; a link arm 8 disposed around the spindle; a hanger engagement portion disposed at a distal end of the link arm; a rolling portion disposed on the link arm; and a rolling guide portion 9 to guide a rolling position of the rolling portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transfer device for transferring a workpiece between different conveyance paths in a so-called overhead type conveyance device that suspends and conveys a workpiece along a conveyance rail provided above an operator, In particular, the present invention relates to an apparatus for transferring a moving member that moves along a conveyance rail in the middle of conveyance without temporarily stopping.

  In general, an overhead type conveying device for suspending and conveying a workpiece includes a conveying rail disposed in a conveying path, a moving member that moves along the conveying rail, and a hanger that is suspended by the moving member. The movement of the hanger has a self-propelled trolley type (see Patent Document 1) or a chain drive type (see Patent Document 2).

The apparatus for transfer in the overhead type conveying apparatus as described above has to load a work to be conveyed on a hanger. Therefore, the conventional transfer device is configured to stop the transport traveling body immediately before the hanger loading / unloading site by causing the connection release means to act on the transport traveling body that continuously travels. In the state, there is one in which the transport traveling body is drawn into the hanger loading / unloading place and the work is transferred by the hanger transfer lifting / lowering means (see Patent Document 3). In this way, in order to transfer a workpiece loaded on a hanger that is continuously transported, loading of the hanger can be stopped by stopping the hanger transport and expanding or contracting the hanger itself or raising and lowering the loading platform from the floor. And it was necessary to manipulate the withdrawal from the hanger.
JP-A-5-270398 (page 2, FIG. 1) Japanese Utility Model Publication No. 7-35418 (FIG. 2) Japanese Patent Laying-Open No. 2003-40413 (page 4-4, FIG. 1)

  The conventional technology as described above is a configuration used when a relatively large workpiece is transferred, but a small workpiece is basically configured in the same manner. As described above, although the structure in which the transporting traveling body that is continuously transported is temporarily stopped for loading and unloading is effective in ensuring the transfer, a hanger unloading place for transfer is secured. In addition, since the transport traveling body temporarily stops, the subsequent transport traveling body is also temporarily stopped, and continuous transport is interrupted. It was to become.

  And when trying to realize transfer to simply change the transport path, after unloading the work loaded on the hanger of the transport traveling body, it will be loaded again on the hanger of the other transport traveling body, It was necessary to secure a hanger loading / unloading place on each transport route. For this reason, it is necessary to secure a space for the hanger loading / unloading place at an appropriate location on the transport path, which hinders space saving in the factory.

  Further, in the above-described prior art, a device for controlling operation and stop for temporary stop or a device for controlling a lift for transfer is required, and the transfer device is expensive. And the transfer apparatus which abbreviate | omitted the control apparatus as much as possible was anxious by the difficulty of the recovery operation by the malfunction of a control apparatus.

  Furthermore, in any of the above prior arts, in order to avoid interference with other subsequent workpieces upon receipt from the transfer source traveling body (moving member), to the transfer destination traveling body (moving member). In order to avoid interference with workpieces that have been delivered in advance, it is necessary to ensure a sufficient distance between successive workpieces, and not only to secure space at the receiving location or delivery location, The density has to be lowered, and the number of workpieces that can be conveyed in a predetermined conveyance path is small.

  The present invention has been made in view of the above points, and the object of the present invention is to save the space (moving member) in a space-saving manner without stopping the continuously transporting traveling body (moving member). It is an object of the present invention to provide a transfer device that can receive a suspended work and transfer it to another transport path, and that can transfer the work without providing a special control device.

  Therefore, the present invention is suspended from the transport rail disposed in the transport path, a moving member that moves along the transport rail, a drive chain that provides driving force to the moving member, and the moving member. In an overhead-type transport apparatus that includes a hanger and transports the object to be transported held by the hanger in a predetermined direction, the apparatus is interposed between two transport rails that form different transport paths and moves the first transport rail. A transfer device for transferring an object to be transferred together with a hanger to a second moving member that moves the second conveying rail from the first moving member, the moving device moving the first and second conveying rails A crawler chain that meshes with at least one of the first and second drive chains that provide drive force to the first and second moving members, and a fixed side sprocket that supports the crawler chain. And a tension side sprocket, a gear group interlocking with the fixed side sprocket, a main shaft rotating horizontally in conjunction with the final gear of the gear group, a link arm provided around the main shaft, and the link arm An overhead type transport comprising a hanger engaging portion provided at a tip, a rolling portion provided in the link arm, and a rolling guide portion for guiding a rolling position of the rolling portion. The gist is a transfer device in the device.

  According to the above configuration, the crawler chain that meshes with at least one of the first and second drive chains can receive the driving force of the driving chain, and the rotation of the crawler chain by this driving force It will be synchronized with the chain. And since the rotation of the fixed-side sprocket that supports the crawler chain and the gear group interlocking with it also indirectly synchronizes with the drive chain, the main shaft rotates in synchronism with the drive chain. . Accordingly, the link arm is adjusted by adjusting the rotational speed of the main shaft (deceleration by a gear group, etc.) so that the moving speed of the tip of the link arm provided around the main shaft matches the traveling speed of the drive chain. When the tip is closest to the drive chain, the link arm tip runs along with the moving member. In such a parallel running state, the link arm rolling part moves along the rolling guide part to move the link arm tip upward so that the hanger on which the link arm is suspended by the moving member is removed. It is possible to release the engagement by the tip of the link arm by lifting it while engaging it and moving it downward.

  Further, the present invention is hung on the transport rail disposed in the transport path, a moving member that moves along the transport rail, a drive chain that provides a driving force to the moving member, and the moving member. In an overhead-type transport apparatus that includes a hanger and transports the object to be transported held by the hanger in a predetermined direction, the apparatus is interposed between two transport rails that form different transport paths and moves the first transport rail. A transfer device for transferring an object to be transported together with a hanger to a second moving member that moves a second transport rail from a first moving member, the main frame and on the main frame in a predetermined direction And a subframe movably arranged, the subframe providing a driving force to first and second moving members that move the first and second transport rails. First and second crawler chains that mesh independently with each other of the two drive chains, first and second fixed-side sprockets and tension-side sprockets that support both crawler chains, and the first and second First and second gear groups whose rotational speeds are adjusted in conjunction with the fixed-side sprocket, a main shaft gear simultaneously meshing with the first and second final gears of both gear groups, and the main shaft gear. A main shaft that rotates horizontally about the center of the shaft, a plurality of link arms that project radially from the periphery of the main shaft, hanger engagement portions provided at respective tips of the link arms, and the link arm In an overhead type conveying apparatus, comprising: a rolling part provided at a lower portion of the rolling part and a rolling guide part for guiding a rolling position of the rolling part. Are the subject matter also transfer device.

  According to the above configuration, the first and second gear groups provided in the subframe receive the driving force from the first and second drive chains via the first and second crawler chains, and finally The gear can rotate in synchronization with the drive chain. In this way, the main shaft gear meshed with the final gear rotating in synchronization with the first and second drive chains is rotated by both final gears. By making the number of teeth of the chain and the reduction ratio of the gear group the same, the rotational speeds of both final gears coincide. And adjusting the timing at which the first moving member moving by the first drive chain arrives at the transfer device and the timing at which the second moving member moved by the second drive chain arrives at the transfer device As a result, the tip of the link arm provided on the main shaft lifts the hanger from the first moving member, which can be hung on the second moving member. In addition, since each of the above members is provided on a subframe, and this subframe is provided so as to be movable on the main frame, one of the first and second drive chains is relaxed during operation. When a situation occurs in which the timing of arrival of the moving member is slightly delayed due to, for example, the rotation of the crawler chain and the gear group is slightly delayed according to the difference in timing of movement of the drive chain, This acts as a difference in driving force with respect to the main shaft gear and acts on the opposite gear group. As a result, the subframe is moved to an intermediate position where the driving forces of both gear groups are balanced.

  The gear group in the above invention can be configured by providing a clutch mechanism between the final gear in one of the first gear group and the second gear group and the rotating shaft thereof. According to such a configuration, the state of the drive chain can be adjusted so that the moving member moved by the first and second drive chains arrives at the transfer device at an optimal timing. Note that the optimum timing is that the moving member arrives when the tip of the link arm is closest to the drive chain arranged in the transfer path on the transfer side, and on the other side of the transfer path to be transferred. This is the timing when the link arm tip arrives closest to the drive chain to be arranged.

  The clutch mechanism according to the present invention includes a clutch plate provided in a hook shape with respect to the rotation shaft for the final gear, and a protrusion protruding on the circumference of the clutch plate on the surface of the clutch plate. A stop protrusion, an engagement hole that allows the engagement protrusion to be engaged in a substantially circular flat surface portion that forms the base portion of the final gear, and an actuator that moves the clutch plate back and forth can be provided. According to the clutch mechanism having the above configuration, the transmission state of the driving force and the release thereof can be operated by operating the actuator. Further, since the engagement between the clutch plate and the final gear is based on the locking projection, the transmission is more reliable than the transmission by the frictional resistance between the clutch plate and the final gear.

  Further, the first drive chain and the second drive chain in any one of the above inventions can be configured to keep the conveyance speed constant in synchronization with each other. According to such a configuration, when the crawler chain is meshed with one of the first and second drive chains and the main shaft is rotated via this, the rotation of the main shaft does not mesh the crawler chain. When the main shaft is rotated by receiving drive force from both the first and second drive chains, the main shaft rotates at the same rotational speed while receiving the drive force of both drive chains. It can be driven.

  Further, the moving member in each of the above inventions is configured to be locked at a constant interval in the moving direction of the drive chain, and the fixed side sprocket and the gear group are linked to the conveyance of the drive chain, The main shaft can be configured to rotate so that the end of the link arm approaches the transport rail in accordance with the arrival period. With such a configuration, the moving member can supply the hanger intermittently at a certain timing or receive the hanger, and by rotating the link arm so as to match the certain timing, Reliable receipt and delivery of hangers is possible.

  The link arm in each of the above inventions includes two parallel arm members, and pivotally supports the base ends of these arm members and pivotally attaches the distal end to the hanger engaging portion. Can be configured. With such a configuration, the hanger engaging portion provided at the distal end of the link arm can be translated without changing its direction. Therefore, even when the height of the link arm tip is changed to engage or release the hanger, the direction of the hanger engaging portion is constant, so the state of the hanger engaging portion relative to the hanger is changed. It will be kept constant.

  Furthermore, the rolling guide portion in each of the above inventions can be configured to include a circular rolling rail and to divide the position of the rolling rail into a high-order part and a low-order part. With such a configuration, when the link arm provided around the main shaft turns according to the rotation of the main shaft, the rolling guide portion can be disposed only on the track through which the rolling member of the link arm passes. . Then, by providing a difference in elevation in the rolling guide portion, the tip of the link arm can be guided to a predetermined height by the rolling member that moves up and down in accordance with this. Guiding the tip of the link arm to a predetermined height means guiding obliquely upward so as to gradually shift from a low position to a high position on the side receiving the hanger, and gradually increasing from the high position on the side receiving the hanger. It is a guide that moves diagonally downward so as to shift to a low level, and it is a horizontal guide that maintains a high level in the middle from receipt to delivery, and there is no special height restriction after delivery, but as preparation before receipt It means horizontal guidance that maintains a low level.

  And the rolling guide part in this case can be set as the structure provided so that a movement to the position which does not receive the rolling of the rolling member of the said link arm was possible. With such a configuration, the restriction of the position of the link arm tip by the rolling guide portion can be released, and the receiving and delivery of the hanger by the hanger engaging portion of the link arm can be released. That is, the main shaft rotates and the link arm turns around the main shaft, but this link arm has no effect on the hanger and can simply turn. As a result, when a part or product that does not require transfer is transported, the transfer device can be temporarily disabled. This is the case when parts in different processing steps are transported using the same transport path, and when transfer to an unnecessary processing line needs to be stopped, or a product with a different return destination should be transported In some cases, the transfer path can be changed without stopping the transfer device.

  Moreover, the moving member in each said invention can be set as the structure which has a suspension auxiliary | assistance part which suspends the said hanger. With such a configuration, the moving member does not have a simple moving function, but can receive and deliver the hanger according to the arrival timing of the moving member. In addition, since the hanger is suspended from the moving member, only the hanger is received from the suspended state, and it is easy to transfer the hanger to the state suspended from the moving member. Can do.

  And the hanger in this case was provided with the engagement piece part for suspension engaged with the said suspension auxiliary part, and the engagement piece part for transfer which can engage the hanger engagement part of the said link arm. According to such a configuration, which can be configured, the hanger when suspended by the moving member is different in a state where the hanger is suspended because the hanging engagement piece portion is used. It can be received or delivered by the link arm in position.

  According to the present invention, the moving member that is continuously conveyed along with the movement of the drive chain runs side by side with the tip of the link arm that revolves at the point where the hanger is to be received and delivered, and stops conveying the moving member. It is possible to transfer to a different transport path via the link arm without any problem.

  Further, according to the invention having the configuration including the main frame and the sub frame, even if one of the drive chains forming different transport paths that move in synchronization is delayed due to relaxation or the like, the sub frame is The hanger can be received and delivered by moving to an appropriate position. And since the workpiece conveyance path is located in the tangential direction with respect to the circular track of the hanger engagement part at the tip of the link arm, the workpiece approaches the contact point with the conveyance path and receives it while running at the same speed as the moving member. Or after passing, it will be separated again along the circular orbit, so that it can be transferred without securing a space before and after the moving member, and even if the front and rear moving members are arranged close to each other, Interference between the work to be transferred and the work suspended by the moving members before and after the work can be avoided. Thereby, many workpiece | work can be suspended on the conveyance path | route which has predetermined | prescribed length, and conveyance efficiency can be improved.

  Further, the hanger can be received and delivered by the link arm by guiding the tip of the link arm in the vertical direction, and can be achieved by guiding the rolling portion provided on the link arm to a predetermined height. Become. And when it comprises so that the rolling guide part for guiding this rolling part can leave | separate from a rolling part, transfer can be interrupted temporarily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the first embodiment, as shown in FIG. 1, a moving member (first moving member) 1 that moves along a transport rail (first transport rail) L <b> 1 disposed in a transport path in a predetermined direction is used. A device that transfers the hanger H that is suspended to a moving member (second moving member) 2 that moves along a conveying rail (second conveying rail) L2 disposed in a conveying path in another direction. is there.

  The transfer device of the present embodiment is provided in a state where the main frame MF is in contact with both the first and second transport rails L1 and L2, and a subframe SF that is movable inside the main frame MF is provided. The subframe SF includes crawler chains 3 and 4 supported by the subframe SF, gear groups 5 and 6 interlocked with the crawler chains 3 and 4, and part of the gear groups 5 and 6. The main shaft 7 is rotated by the final gears 51 and 61 constituting the shaft, a plurality of link arms 8 arranged around the main shaft 7, and a rolling guide portion 9 for adjusting the height of the tip of the link arm 8. Has been.

  The first and second moving members 1 and 2 are respectively engaged with the links of the drive chains C1 and C2, and a driving force is applied in the traveling direction of the drive chains C1 and C2 (arrow direction in the figure). Yes, the traveling wheels 11, 12, 21, and 22 disposed above the drive chains C1 and C2 roll along the plane portions of the transport rails L1 and L2, and thus move along the transport rails L1 and L2. Is possible. Moreover, substantially ring-shaped suspension assisting portions 13 and 23 are provided below the moving members 1 and 2 so that the upper end of the hanger H can be suspended.

  The crawler chains 3 and 4 mesh with the above-described drive chains C1 and C2, so that the crawler chains 3 and 4 can be rotated by the driving force of the drive chains C1 and C2. The crawler chain means an endless belt-like chain that is tensioned by two sprockets, and has a configuration in which protrusions that mesh with the drive chains C1 and C2 are provided at appropriate intervals.

  One of the sprockets for maintaining the rotation of the crawler chains 3 and 4 is provided with initial gears 52 and 62 of the gear groups 5 and 6 sharing the rotation shaft, and the driving force is transmitted to the gears. It can be transmitted to the groups 5 and 6. The gear groups 5 and 6 are arranged above the subframe SF except for the final gears 51 and 61, and the rotation speed and the rotation direction are adjusted by a plurality of gears. The final gears 51 and 61 are arranged below the subframe SF while sharing the rotation axis with the end gears 53 and 63 above the subframe SF in the gear groups 5 and 6.

  The rotational driving force whose rotational speed and rotational direction are adjusted as described above is transmitted via the final gears 51 and 61 to the main shaft gear 71 engaged therewith. That is, the main shaft gear 71 is fixed all around the outer peripheral surface of the cylindrical main shaft 7, and the first and second final gears 51 and 61 are engaged with each other on the opposite side across the axis of the main shaft 7. The rotational driving force is transmitted from both sides. The main shaft 7 is rotatably supported at the lower part of the subframe SF. Moreover, it is comprised so that the support shaft 91 of the rolling guide part 9 can be penetrated inside the cylinder of the main shaft 7, and the front-end | tip of the support shaft 91 of the rolling guide part 9 was provided in sub-frame SF. It is connected to an actuator (cylinder device) 10 and is supported at a predetermined height, and can be moved in the vertical direction by the actuator 10. And the rolling rail 92 is comprised by the lower end of the support shaft 91 via the rib.

  A radially projecting link arm 8 is disposed at the lower end of the main shaft 7 with an appropriate angle so that the link arm 8 turns around the main shaft 7 as the main shaft 7 rotates. It has become. In the present embodiment, twelve link arms 8 are provided on the entire circumference at intervals of a predetermined angle (30 ° in the angle of the center line), and the line connecting the tips of the link arms 8 is substantially regular twelve. It arrange | positions so that a square may be formed. Further, rolling members 81 are provided at the lower portions of the link arms 8 so that the surface of the rolling rail 92 of the rolling guide portion 9 can roll.

  In the present embodiment, since the drive chains C1 and C2 are transported, the moving members 1 and 2 move as well as the main shaft 7 rotates and the link arm 8 It is configured to be able to turn around the main shaft 7.

  Here, the detail of the principal part of this embodiment is demonstrated.

  As shown in FIG. 2, the main frame MF is configured in a quadrilateral shape as a whole, and a set of rail members L3 and L4 that straddle two opposing sides are provided in parallel. The rail members L3 and L4 are disposed so as to contact the upper surfaces of the transport rails L1 and L2. The subframe SF is configured in a quadrilateral shape smaller than the main frame MF, and can be arranged inside the main frame MF. The subframe SF is provided with wheel members R1, R2, R3, and R4 on both sides thereof, and can roll on the upper surfaces of the rail members L3 and L4. Further, auxiliary wheels R31 and R32 for preventing wheel removal are arranged in the vicinity of the wheel members R1 to R4 with the rolling surfaces facing sideways, and the wheel members R1 to R4 are rail members L3 and L4. When installed on the upper surface, the side surfaces of the rail members L3, L4 can be rolled.

  With such a configuration, the subframe SF is supported by the main frame MF, and when the external force in the longitudinal direction of the rail members L3 and L4 acts on the subframe SF, the subframe SF is in accordance with the external force. It is free to move on. The subframe SF supports the crawler chains 3 and 4, the gear groups 5 and 6, the main shaft 7, and the rolling guide portion 9. When the subframe SF moves, all of these main members are supported. Is supposed to move.

  As shown in FIG. 3, the gear groups 5 and 6 are configured to be interlocked by meshing or coaxially from the initial gears 52 and 62 to the final gears 51 and 61. In the gear group, the initial gears 52 and 62, the end gears 53 and 63, and the intermediate gears 54 and 64 are arranged on the upper surface of the subframe SF (see FIG. 1 or 2), but the final gear 51 is included. , 61 are arranged separately below the subframe SF. Further, sprockets 31, 32, 41 and 42 for maintaining the rotation of the crawler chains 3 and 4 are supported on the lower surface side of the subframe SF, and of these, the sprockets 31 and 41 are coaxial with the fixed side sprockets 31 and 41. Initially gears 52 and 62 are arranged. Accordingly, when the crawler chains 3 and 4 obtain driving force, the initial gears 52 and 62 are rotationally driven, and the rotational driving force can be transmitted to the end gears 53 and 63 via the intermediate gears 54 and 64. Yes. Then, the rotational driving force is transmitted to the final gears 51 and 61 coaxial with the end gears 53 and 63. Of the sprockets 31, 32, 41, 42 that maintain the rotation of the crawler chains 3, 4, the other sprocket 32, 42 is provided as a tension side, and the rotating shaft is away from the fixed side sprockets 31, 41. It is supported by the subframe SF while being urged by.

  As shown in FIG. 3, the main shaft 7 is provided with a main shaft gear 71 on a part of a cylindrical main body, and the teeth of the main shaft gear 71 mesh with the final gears 51 and 61. Thus, the main shaft 7 can be rotated in the circumferential direction around the axis. The link arm 8 provided in the vicinity of the lower end of the main shaft 7 is turned.

  As shown in FIG. 4, the link arm 8 turns around the main shaft 7 while being guided by the surface of the rolling rail 92 of the rolling guide portion 9. That is, as shown in this figure, each link arm 8 has two arm members 82 and 83 arranged vertically with a predetermined interval, and a hanger engaging portion 84 is provided at the tip thereof. ing. The base ends of the arm members 82 and 83 are pivotally supported by base end support portions 72 and 73 provided on the surface of the main shaft 7, and the tip ends thereof are tip support portions 85 and 86 of the hanger engagement portion 84. The link arm 8 is configured so that the inclination angle of the link arm 8 can be changed in accordance with the height of the hanger engaging portion 84. Further, by supporting the base end and the distal end while maintaining both the arm members 82 and 83 in parallel, the direction of the hanger engaging portion 84 is kept constant regardless of the height of the hanger engaging portion 84. Can be done. In other words, the height can be changed in the vertical direction so that the hanger engaging portion 84 is translated.

  A rolling member 81 that protrudes further downward is provided on the lower surface of the arm member 83 located on the lower side of the arm members 82 and 83 that constitute the link arm 8. As the link arm 8 turns, the rolling member 81 can roll on the surface of the rolling rail 92 of the rolling guide portion 9 that is fixed (not rotating). As a result of this rolling, the height of the rolling member 81 changes depending on the height of the surface of the rolling rail 92, and the inclination angle of the lower arm member 83 is changed via this rolling member 81. Specifically, the entire inclination angle of the link arm 8 can be changed, and the height of the hanger engaging portion 84 can be adjusted. That is, as shown in the figure, the rolling rail 92 of the rolling guide portion 9 is divided into a low-level guide region 93, a high-level guide region 94, and an intermediate inclined region 95, and the rolling member 81 is When moving the lower guide region 93, the hanger engaging portion 84 is set to a low position, and when moving the high guide region 94, the hanger engaging portion 84 is set to a high position, and the inclined region 95 is passed. Thus, the hanger engaging portion 84 can be gradually raised or lowered.

  The height adjustment of the hanger engaging portion 84 as described above realizes reception and delivery of the hanger H. That is, the hanger H is provided with a suspension engagement piece H2 at the upper end of the support H1, and a transfer engagement piece H3 below the suspension engagement piece H2. The lower engaging piece H2 is locked to the suspension assisting portions 13 and 23 fixed to the drive chain, and the transfer engaging piece H3 is locked to the hanger engaging portion 84. It is.

  Here, the relationship between the drive chains C1 and C2 and the link arm 8 will be described in detail. As shown in FIG. 5, the drive chains C1 and C2 are approximately the track circle at the tip when the link arm 8 turns. When the link arm 8 is disposed in the tangential direction and the longitudinal direction of the link arm 8 is perpendicular to the longitudinal direction of the drive chains C1 and C2, the moving members 1 and 2 are closest to the tip of the link arm 8 (the shortest linear distance is Become). The peripheral speed at which the tip of the link arm 8 turns coincides with the moving speed of the drive chains C1 and C2, and there is a slight change in the distance when the moving members 1 and 2 approach as described above. It is possible to make things almost parallel.

  In such a substantially parallel running state, as shown in FIG. 6, the hanger engaging portion 84 is moved up and down by gradually changing the height of the tip of the link arm 8. It can be handed over. As shown in this figure, when the longitudinal direction of the link arm 8 is substantially horizontal, the hanger engaging portion 84 does not lock the transfer engaging piece H3 of the hanger H, and the link arm 8 When the front end of the link arm 8 is raised and the longitudinal direction of the link arm 8 is inclined, the hanger engagement portion 84 is configured to lock the transfer engagement piece H3. Thus, by causing the link arm 8 to be inclined, the distance W1 between the hanger engaging portion 84 that moves on the circular track and the moving members 1 and 2 (hangers H) that move linearly is set. It can be adjusted. That is, when the hanger engaging portion 84 turns at the same height, the timing at which the hanger engaging portion 84 and the moving members 1 and 2 (hangers H) are closest to each other is instantaneous (FIG. 5). Since the link arm 8 is inclined and the distance W2 in the horizontal direction of the link arm 8 is slightly shortened, it is possible to maintain the state in which the two approach each other.

  Next, the operation | movement aspect of this embodiment is demonstrated. Since the present embodiment is configured as described above, as shown in FIG. 4, when the drive chains C1 and C2 are moved, the main shaft 7 is rotated in conjunction therewith. The link arm 8 pivots around the main shaft 7 in accordance with the moving speed of the moving members 1 and 2 fixed to the drive chains C1 and C2 at intervals, and the hanger engaging portion 84 is high at a position where the link arms 8 are closest to each other. By changing the height, the hanger H can be received or handed over.

  The state of receiving and delivering the hanger H will be described in detail with reference to FIGS. FIG. 7 shows the state of the moving members 1 and 2 and the hanger engaging portion 84 when the hanger H is delivered, and FIG. 8 shows the state when the hanger H is received. Note that receiving means lifting the hanger H from the first moving member 1 fixed to the first drive chain C1, and delivery means fixing the hanger H in the lifted state to the second drive chain C2. This is the case where the second moving member 2 is engaged.

  As shown in FIG. 7, in order to receive the hanger H, first, the hanger engaging portion 84 moves in a low state and approaches the moving member 1 (FIG. 7A). In this state, the hanger engagement portion 84 can be positioned below the transfer engagement piece H3 of the hanger H. Then, the hanger engagement portion 84 is gradually raised (the link arm 8 is inclined), and the hanger engagement portion 84 is brought into contact with the lower portion of the transfer engagement piece H3 (FIG. 7B). ). As a result, the transfer engagement piece H3 is locked to the hanger engagement portion 84. Since the transfer engagement piece H3 protrudes laterally from the column H1 and is inclined obliquely downward, the hanger engagement portion 84 is located on the lower inner side of the transfer engagement piece H3. The hanger H can be locked by coming into contact with the hanger. Then, from the locked state, the hanger engaging portion 84 is further raised (the link arm 8 is further inclined), whereby the entire hanger H can be lifted (lifted). When the combined piece H2 is lifted higher than the suspension assisting portion 13 of the moving member 1, the suspension engaging piece H2 can be disengaged from the engagement by the suspension assisting portion 13 ( FIG. 7 (c)). In this way, the moving member 1 moves and the link arm 8 pivots in a state where the hanging engagement piece H2 of the hanger H is disengaged from the suspension assisting portion 13, so that the two are separated. As a result (FIG. 7D), the hanger H (particularly the suspension engaging piece H2) can be detached from the moving member 1 (particularly the suspension auxiliary part 13). This completes the reception of the hanger H.

  In the case of delivery, as shown in FIG. 8, the operation is the reverse of the above receipt. That is, the link arm 8 approaching the receiving-side drive chain C2 turns with the hanger engaging portion 84 positioned higher (FIG. 8A). And in the state which approached until the engagement piece part H2 for suspension of the hanger H came to the state located above the suspension auxiliary | assistant part 23 of the moving member 2 (FIG.8 (b)), a hanger engagement part gradually. By lowering 84, the suspension engaging piece H2 is locked to the suspension assisting portion 23 (FIG. 8C). In this locked state, the hanger engaging portion 84 is still in contact with the hanging engagement piece H3 of the hanger H (the hanging engagement piece H3 is locked). The contact (locking) is released by lowering the joint portion 84 (FIG. 8D). In this way, the hanger engagement portion 84 completes the delivery by releasing the locking of the suspension engagement piece H3. Thereafter, the hanger engaging portion 84 is separated from the moving member 2, and the hanger H is suspended from the moving member 2 and is conveyed according to the drive chain C2.

  Next, the position adjustment of the main shaft 7 by moving the subframe SF will be described. FIG. 9 is a diagram illustrating a state in which the drive chains C1 and C2 and the crawler chains 3 and 4 are meshed with each other. As described above, the crawler chains 3 and 4 are endless belt-like chains, and the protrusions 33 and 43 are provided on the surface at appropriate intervals, and the protrusions 33 and 43 are link frames of the drive chains C1 and C2. Since the crawler chains 3 and 4 are partly in line contact with the drive chains C1 and C2 arranged in a straight line, a plurality of protrusions 33 are simultaneously provided in the line contact range. , 34 are engaged with each other.

  Therefore, in the state of normal operation, as shown in FIG. 9A, in the crawler chain 3 that meshes with the drive chain C1 that is the conveyance source, one 33A among the protruding portions 33 that mesh simultaneously is positioned at the center. At this time, also in the crawler chain 4 that meshes with the drive chain C2 that is the transport destination, one protrusion 43A is located in the center, and the axis of the main shaft 7 coincides with both of these 33A and 43A. This is because when the moving member 1 that moves along the transporting drive chain C1 arrives at the center of the crawler chain 3, the transporting drive chain C2 moves the moving member 2 to the center of the other crawler chain 4. It means to move. When the moving members 1 and 2 are moved to the center of the crawler chains 3 and 4, the moving member 1 is present at the shortest position at a linear distance from the main shaft 7, so that the main shaft 7 is matched with this. By rotating, the link arm 8 is positioned so that the longitudinal direction of the link arm 8 is perpendicular to the drive chains C1 and C2 (see FIG. 5).

  However, if the timing at which the crawler chains 3 and 4 reach is different because one of the drive chains C1 and C2 is loosened, etc., when the transfer source moving member 1 reaches the center of the crawler chain 3, The transfer destination moving member 2 may not reach the center of the crawler chain 4 or may have already passed.

  Here, FIG. 9B illustrates the case where the timing at which the moving member 2 arrives by the drive chain C2 at the transport destination is delayed. As shown in this figure, when the projection 33A of the crawler chain 3 that meshes with the drive chain C1 of the conveyance source moves to the shortest position with a linear distance to the main shaft 7, the projection 43A of the crawler chain 4 of the conveyance destination reaches. Not done. At this time, when the crawler chain 4 of the transport destination is delayed (the drive chain C2 is delayed), the gear group 6 (FIG. 3) interlocked with the fixed-side sprocket 41 that supports the crawler chain 4 according to the delay of the crawler chain 4. Therefore, the rotation speed of the final gear 61 cannot catch up with the main shaft gear 71 rotating via the other final gear 51 (acts as a reverse driving force). In this case, originally, the driving force acts in the opposite direction, so that the gears 51, 61, 71 may rotate according to the strong driving force of any one of the driving forces. However, as described above, the entire transmission mechanism from the crawler chains 3 and 4 to the main shaft 7 can be moved via the subframe SF, so that the driving force in the opposite direction to the main shaft 7 rotating in the forward direction is a resistance. The entire transmission mechanism including the sub-frame SF moves in a direction that acts and can relax this resistance. As a result, the final gears 51 and 61 rotate at the same rotational speed without receiving the other resistance, and the crawler chains 3 and 4 can reach the protrusions 33A and 43A at predetermined positions at the same time.

  In this way, the drive chains C1 and C2 are set so as to move at the same conveyance speed. However, even when the drive chains C1 and C2 are relaxed, the reaching state of the moving members 1 and 2 is made constant. be able to.

  Since the present embodiment is as described above, the workpiece can be transferred while operating the first and second drive chains. In other words, the hanger H can be received by the link arm 8 in the middle of the movement without stopping the first moving member 1, and the hanger H that suspends the received workpiece moves without stopping. It can be delivered to the second moving member 2. This eliminates the need for a special space for transfer. Further, since the moving members 1 and 2 are arranged in contact with the orbital circle of the hanger engaging portion 84 provided at the tip of the link arm 8, the hanger engaging portion 84 is gradually moved to the moving members 1 and 2. After approaching and receiving or handing off, it will be separated along the circular path, so that the other moving members 1 and 2 (particularly the movement thereof) continuous before and after the moving members 1 and 2 to be picked up or handed over. Interference with the workpiece suspended by the member can be avoided. And the special control apparatus for that is not required.

  Further, as described above, the sub-frame SF is movable inside the main frame MF, and the main shaft 7 is rotated by the final gears 51 and 61 to which different driving forces are individually transmitted from both the driving chains C1 and C2. Therefore, when there is a difference between the rotational speeds of both the final gears 51 and 61, the crawler chains 3 and 4 are based on the difference in the direction of the driving force acting on the main shaft gear 71. Thus, the drive chains C1 and C2 move in either the forward or reverse direction, and position adjustment and timing adjustment are possible without using a complicated mechanism such as a control device. This is effective in adjusting the timing when the drive chains C1 and C2 are relaxed.

  Next, a second embodiment will be described. In the present embodiment, as shown in FIG. 10, a clutch device 100 is interposed between a rotary shaft 65 to which a driving force is transmitted by the second crawler chain 4 and the final gear 61, and the clutch mechanism is combined with the final gear 61. It constitutes. The clutch device 100 is continuously provided at the lower end of the rotary shaft 65, and the final gear 61 is supported via the rotary shaft 65 and a bearing, and the driving force of the rotary shaft 65 is directly transmitted to the final gear 61. It is transmitted through the clutch device 100. The clutch device 100 includes a circular plate-like clutch plate 110 provided in a bowl shape at the lower end of the rotating shaft 65, and the surface of the clutch plate 110 (upper surface in the drawing) is appropriately spaced in the circumferential direction. Locking protrusions 111 to 116 are provided. On the other hand, the final gear 61 that receives the driving force transmitted from the clutch plate 110 is provided with engagement holes 121 to 126, and the surface of the clutch plate 110 is opposed to the surface of the final gear 61 (the lower surface in the drawing). When coming into contact, the locking projections 111 to 116 are engaged with the engagement holes 121 to 126 to enable transmission of driving force.

  The clutch device 100 of the present embodiment is configured to transmit a driving force as it moves upward toward the final gear 61 and to cancel the transmission of the driving force when it descends. As a mechanism for that purpose, the clutch plate 110 is configured to be movable up and down around the rotation shaft 65. That is, the lower end of the rotary shaft 65 is configured with a transmission shaft 130 having a reduced diameter, and the transmission shaft 130 is disposed so as to pass through the clutch plate 110 and protrude below the clutch plate 110. The clutch plate 110 can slide with respect to 130. In addition, an annular continuous portion 140 that is continuous with the lower portion of the clutch plate 110 and an operating portion 150 that is configured in a hook shape at the lower end thereof are provided, and a circular plate-like stopper 160 provided at the lower end of the transmission shaft 130. A compression spring 170 is arranged in the middle, and the clutch plate 110 is biased upward via the continuous portion 140 and the operating portion 150 with the lower end of the transmission shaft 130 as a base point. Furthermore, rolling members 181 and 182 (one rolling member 182 is not shown in the figure) are arranged on the upper plane of the operating portion 150, and the operating portion 180 supports the rolling members 181 and 182. ing. An expansion rod 191 of an actuator (cylinder device) 190 is connected to the operation unit 180 so that the clutch plate 110 can be lowered against the bias of the compression spring 170. Even when the operation unit 180 contacts the operation unit 150 via the rolling members 181 and 182, the clutch plate 110 is rotated by the rotation shaft 65, and the operation unit 150 continuing to the clutch plate 110 is also rotated. The operation unit 180 does not rotate. That is, the rolling members 181 and 182 only roll on the upper plane of the operating portion 150.

  Incidentally, the transmission portion 130 is provided with a key groove in the axial direction, and a key that engages with the key groove is formed on the inner diameter portion of the clutch plate 110 so that the clutch plate 110 is moved up and down (transmitted). The driving force of the transmission shaft 130 can be transmitted even when sliding in the axial direction of the portion 130. This can also be realized by making the transmission shaft 130 a polygonal cross section and engaging the inner diameter portion of the clutch plate 110 with the polygon.

  Needless to say, the clutch device 100 is configured such that the actuator 190 is supported by the subframe SF and the position thereof is fixed. Further, since the compression spring 170 is interposed between the operating portion 150 and the stopper 160, when the rotary shaft 65 rotates, the compression spring 170 rotates together with the transmission shaft 130, the operating portion 150, and the stopper 160.

  The operation mode of the clutch mechanism in the present embodiment will be described. The clutch mechanism of this embodiment can transmit driving force or release it by operating an actuator (cylinder device) 190. That is, when the actuator (cylinder device) 190 is in a free state, the clutch plate 110 is lifted via the operating portion 150 by the biasing force of the compression spring 170. Due to this rise, the locking projections 111 to 116 provided on the surface of the clutch plate 110 are engaged with the engagement holes 121 to 126 of the final gear 61, and the driving force transmitted to the clutch plate 110 is finally reached. This is transmitted to the gear 61. Such a state can also be realized by positively projecting the telescopic rod 191 of the actuator (cylinder device) 190. On the contrary, in order to cancel the drive transmission, it is realized by operating the actuator (cylinder device) 190 to contract the telescopic rod 191. That is, when the actuator 190 is also operated, the operating portion 180 lowers the operating portion 150 via the rolling members 181 and 182, and accordingly, the clutch plate 110 is lowered and the locking projections 111 to 116 are moved to the final gear. The drive force transmitted to the clutch plate 110 is disconnected from the final gear 61 when it is removed from the engagement holes 121 to 126 of 61.

  The reason why the clutch plate 110 (actuating portion 150) is lowered by the actuator 190 in this way is because it is necessary to resist the urging by the compression spring 170, and the clutch plate 110 (actuation) is actuated by the compression spring 170. The portion 150) is urged upward (in a state where the driving force is transmitted) when driven by a malfunction of the actuator 190 (for example, a pressure drop) while the transfer device is operating normally and continuously. This is to avoid interruption of power. Furthermore, the number of the engagement protrusions 111 to 116 and the engagement holes 121 to 126 corresponds to the number of teeth of the final gear 61 (for example, one for two teeth), and the number necessary for the timing to be adjusted. The locking projections 111 to 116 and the engaging holes 121 to 126 can be provided.

  Since the present embodiment is configured as described above, a state in which the driving force is not transmitted to the second final gear 61 by the clutch mechanism is enabled. When the driving force is not transmitted to the second final gear 61, the main shaft 7 can be rotated only by the driving force of the first final gear 51. Thereby, in the state before operating the entire transfer device, that is, in the state where the transported object is not actually transported by the moving members 1 and 2, the timing at which the moving members 1 and 2 arrive at the main shaft 7, and the link arm 8 The timing at which the hanger engaging portion 84 contacts the moving members 1 and 2 by rotating can be adjusted (see FIG. 1). That is, by rotating both the driving chains C1 and C2 to move the moving members 1 and 2 while rotating only the driving force of one driving chain (first driving chain) C1, the main shaft 7 is rotated. The link arm 8 turns around the main shaft 7 in a state interlocked with the timing of movement of one moving member (first moving member) 1, and the turning state of the link arm 8 is changed to the other moving member (first movement member). The subframe SF can be moved so as to coincide with the arrival timing of the second moving member 2).

  Next, a third embodiment will be described. In the present embodiment, as shown in FIG. 11, an actuator (cylinder device) 200 is interposed between a main frame MF and a subframe SF. As described above (in the description of the first embodiment), the subframe SF is arranged inside the main frame MF, and is configured to be movable along the rail members L3 and L4 of the main frame MF. Therefore (see FIG. 2), when an external force along the longitudinal direction of the rail members L3, L4 acts on the subframe SF, the subframe SF can move freely in the direction. However, the movement of the subframe SF for essential fine adjustment is sufficient, but if the subframe SF moves unnaturally or suddenly, the subframe SF may not run out of control. Therefore, the brake function can be exhibited by interposing the actuator (cylinder device) 200 between both frames as in the present embodiment. The actuator 200 is free for the specified position variation, but is controlled so as to operate when the actuator 200 moves significantly beyond the specified value.

  The base end 210 of the actuator 200 is pivotally supported on the outer frame of the main frame MF, and the telescopic rod distal end 220 is pivotally supported on the intermediate frame of the subframe SF. The accuracy with respect to the vertical position fluctuation due to the deflection of the rail members L3 and L4 of the frame MF is reduced.

  The embodiments of the present invention are as described above, but various aspects can be employed without departing from the spirit of the present invention. For example, in the embodiment described above, the drive chains C1 and C2 are synchronized in the drive source so as to have the same conveyance speed. Therefore, although there may be a shift in the movement timing due to the chain loosening or the like, the transport speed itself is not changed. Therefore, when there is no possibility that the moving timing of the moving members 1 and 2 is changed due to the presence of the driving source or the synchronization adjusting device in the vicinity of the transfer device for the driving chains C1 and C2, the subframe SF is It is not necessary to be movable inside the main frame MF, and it can be an integral frame. For the same reason, the transmission of the driving force by the first and second gear groups 5 and 6 to the main shaft gear 71 can be eliminated. Furthermore, the number of link arms 8 is shown as an example, and can be changed according to the application. The state in which the contact of the link arm 8 with the rolling member 81 by the rolling guide portion 9 is not shown is not shown, but as already explained, the support shaft 91 is inserted through the hollow interior of the main shaft 7. Since the sub-frame SF is connected to the actuator (cylinder device) 10, the cylinder guide of the cylinder device 10 causes the rolling guide portion 9 to be greatly lowered, and the rolling rail 92 is a rolling member 81 of the link arm 8. It goes without saying that the guide of the rolling member 81 can be released by making it in a state where it cannot abut.

It is explanatory drawing which shows the outline of 1st embodiment of this invention. It is explanatory drawing which shows the relationship between a main frame and a sub-frame. It is explanatory drawing which shows the main parts except a frame part. It is explanatory drawing which shows the relationship between a main axis | shaft, a link arm, and a rolling guide part. It is explanatory drawing which shows the relationship between a drive chain and a link arm. It is explanatory drawing which shows the relationship between a link arm and a hanger. It is explanatory drawing which shows the operation | movement aspect of 1st embodiment. It is explanatory drawing which shows the operation | movement aspect of 1st embodiment. It is explanatory drawing which shows the state of the relationship between a drive chain and a crawler chain, and the position adjustment of a main shaft. It is explanatory drawing which shows 2nd embodiment. It is explanatory drawing which shows 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st moving member 2 2nd moving member 3 1st crawler chain 4 2nd crawler chain 5 1st gear group 6 2nd gear group 7 Main shaft 8 Link arm 9 Rolling guide part 11,12, 21, 22 Traveling wheels 13, 23 Suspension assisting parts 31, 41 Fixed side sprockets 32, 42 Tension side sprockets 51, 61 Final gears 52, 62 Initial gears 53, 63 End gears 54, 64 Intermediate gears 65 Rotary shaft 71 For main shaft Gear 81 Rolling member 82, 83 Arm member 84 Hanger engaging portion 91 Support shaft 92 for rolling guide portion Rolling rail 100 Clutch device 110 Clutch plates 111, 112, 113, 114, 115, 116 Locking protrusions 121, 122 , 123, 124, 125, 126 Engagement hole 130 Transmission shaft 140 Intermediate part 150 Operation part 160 Stopper 170 Compression spring 180 Operation part 1 81,182 Rolling member 190 Cylinder device 191 Telescopic rod C1 First drive chain C2 Second drive chain H Hanger H1 Hanger column H2 Suspension engagement piece H3 Transfer engagement piece L1, L2 Transport Rail L3, L4 Rail member MF Main frame SF Subframe R1, R2, R3, R4 Wheel member R31, R32 Auxiliary wheel

Claims (11)

A transport rail disposed in the transport path; a moving member that moves along the transport rail; a drive chain that provides a driving force to the moving member; and a hanger suspended from the moving member, In the overhead type transport device that transports the object to be transported held by the hanger in a predetermined direction,
The object to be transported is placed together with the hanger from the first moving member that moves between the two transport rails that form different transport paths and moves from the first moving member that moves the first transport rail to the second transport rail. A transfer device for transferring,
A crawler chain that meshes with at least one of the first and second drive chains that provide driving force to the first and second moving members that move on the first and second transport rails, and a fixing that supports the crawler chain Side sprocket and tension side sprocket, a gear group linked to the fixed side sprocket, a main shaft that rotates horizontally in conjunction with the final gear of the gear group, a link arm provided around the main shaft, and An overhead comprising a hanger engaging portion provided at the tip of the link arm, a rolling portion provided in the link arm, and a rolling guide portion for guiding a rolling position of the rolling portion. Transfer device in a mold transfer device. A transport rail disposed in the transport path; a moving member that moves along the transport rail; a drive chain that provides a driving force to the moving member; and a hanger suspended from the moving member, In the overhead type transport device that transports the object to be transported held by the hanger in a predetermined direction,
The object to be transported is placed together with the hanger from the first moving member that moves between the two transport rails that form different transport paths and moves from the first moving member that moves the first transport rail to the second transport rail. A transfer device for transferring,
A main frame and a sub frame arranged to be movable in a predetermined direction on the main frame;
The first and second sub-frames independently mesh with each of the first and second drive chains that provide driving force to the first and second moving members that move on the first and second transport rails. Two crawler chains, first and second fixed-side sprockets and tension-side sprockets that support both crawler chains, and a first whose rotation speed is adjusted in conjunction with the first and second fixed-side sprockets. And the second gear group, the main shaft gear simultaneously meshing with the first and second final gears of the two gear groups, the main shaft rotating in the horizontal direction around the center of the main shaft gear, and the main shaft A plurality of link arms projecting radially around the periphery, hanger engaging parts provided at the respective tips of the link arms, rolling parts provided at the lower part of the link arms, and the rolling arms Transfer device in overhead conveying apparatus, characterized in that parts are sub-frame and a rolling guide unit for guiding the rolling position of. 3. The transfer in the overhead type conveying apparatus according to claim 2, wherein the gear group is a gear group in which a clutch mechanism is provided between a final gear in one of the first gear group and the second gear group and a rotation shaft thereof. apparatus. The clutch mechanism includes a clutch plate provided in a bowl shape with respect to the rotation shaft for the final gear, and a locking protrusion that protrudes on the surface of the clutch plate on a circumference around the rotation shaft, 4. The overhead type according to claim 3, wherein the overhead mechanism is a clutch mechanism comprising an engagement hole for allowing the engagement protrusion to be engaged in a substantially circular flat portion constituting the base of the final gear, and an actuator for moving the clutch plate forward and backward. Transfer device in the transport device. The overhead according to any one of claims 1 to 4, wherein the first drive chain and the second drive chain are first and second drive chains that are maintained at a constant conveyance speed in synchronization with each other. Transfer device in a mold conveying device. The moving member is a moving member that is locked at a constant interval in the moving direction of the drive chain, and the fixed-side sprocket and the gear group arrive at the moving member while interlocking with the conveyance of the drive chain. The transfer device in the overhead type conveying device according to any one of claims 1 to 5, which is a fixed-side sprocket and a gear group that rotate the main shaft so that the tip of the link arm approaches the conveying rail in accordance with a cycle. The link arm includes two parallel arm members, and pivotally supports the base ends of these arm members, and is configured such that the distal end is pivotally attached to the hanger engaging portion. The transfer apparatus in the overhead type conveying apparatus according to claim 1, wherein the transfer apparatus is a link arm. The said rolling guide part is a rolling guide part provided with a circular rolling rail, and the position of this rolling rail is divided into a high-order part and a low-order part. A transfer device in an overhead conveying device. 9. The transfer device in an overhead type conveying apparatus according to claim 8, wherein the rolling guide part is a rolling guide part provided so as to be movable to a position where the rolling member of the link arm is not subjected to rolling. The transfer device in the overhead type conveying device according to claim 1, wherein the moving member is a moving member having a suspension assisting portion for suspending the hanger. The said hanger is a hanger provided with the engagement piece part for suspension engaged with the said suspension auxiliary part, and the engagement piece part for transfer which can engage the hanger engagement part of the said link arm. Item 11. The transfer device in the overhead type conveying device according to Item 10.

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