JP6593067B2 - Transport device - Google Patents

Description

  The present invention relates to a transport apparatus, and more particularly, to a transport apparatus that can move an object having a through hole between two positions.

  In the processing apparatus, there is a case where a transfer device that moves an object (workpiece) between two positions is used. For example, Patent Document 1 discloses a transport mechanism for a press apparatus. The transport mechanism includes a work carry-in means for transporting a work before processing from the supply section to the press section, and a work unloading means for transporting the processed work from the press section to the storage section. Each of the work carry-in means and the work carry-out means holds the work using a chuck hand.

Japanese Patent Laid-Open No. 10-286699

  As shown in Patent Document 1, when a workpiece is held and transported using a chuck hand or the like, when the chuck hand is holding a certain workpiece, the chuck hand is compared with another workpiece. I can't do anything. That is, the operation of receiving another workpiece cannot be started until the transfer device completes a series of steps of receiving a certain workpiece, moving it to a predetermined position, and delivering it to the counterpart device. Therefore, the workpiece is sequentially transferred, such as the next workpiece is transferred after the transfer of a certain workpiece is completed. This requires a long time to transport a large number of workpieces. In particular, when workpieces are supplied continuously one after another from a device or the like provided upstream, the time required for workpiece conveyance may limit the workpiece supply speed.

  If a plurality of workpieces can be conveyed in parallel with a time difference, rather than sequentially, a large number of workpieces should be efficiently conveyed. In particular, when the workpiece has a shape having a through-hole such as a ring shape, it is considered that there is room for devising an efficient conveyance method using the shape.

  The problem to be solved by the present invention is to provide a transport apparatus capable of transporting a plurality of objects having through holes at the same time with a time difference.

  In order to solve the above-described problems, a transport device according to the present invention includes a rotating unit that rotates about a rotation axis, an axis that is parallel to the rotation axis, and different angular positions about the rotation axis. In the state where a plurality of skewer-shaped holding members whose base ends are fixed to the rotating part and one of the holding members is in a first rotation position, an object having a through-hole is passed through the through-hole. An introduction portion that is hung on the one holding member in the hole, and one of the holding members is hung on the one holding member in a state of being in a second rotation position different from the first rotation position. And a discharge portion for extracting the object.

  Here, the holding member has a length that allows a plurality of the objects to be hung, and the discharge unit can remove the plurality of objects at a time from the holding member on which the objects are hung. It should be possible.

  The conveyance device may further include a cooling unit that contacts the refrigerant with the holding member in the middle of a path along which the holding member is rotated from the second rotation position to the first rotation position.

  The conveying device may further include a drop-off portion that drops the object hung on the holding member from the holding member.

  It is preferable that the holding member is arranged with its axis horizontal, and the introduction portion has pushing means for pushing the object toward the base end of the holding member.

  It is preferable that the holding member is arranged with its axis horizontal, and the discharge portion includes an extruding unit that pushes the object hung on the holding member toward the tip side of the holding member.

  In the transport device according to the invention, the plurality of holding members are rotated about the rotation axis, and the introduction and discharge of the object are performed at the first rotation position and the second rotation position, respectively. In the first rotation position, the object hung on a holding member (first holding member) by the introduction unit is removed from the object by the discharge unit when the holding member rotates to the second rotation position. Removed. A holding member (for example, a second holding member) different from the first holding member reaches the first rotation position with a time difference from the first holding member, and the object is hung thereon. Then, the second rotational position is reached with a time difference from the second holding member, and the object is removed. In this way, the object can be conveyed from the first rotation position to the second rotation position with a time difference for a plurality of objects. The operation of placing the object on the holding member at the first rotation position and the operation of removing the object from the holding member at the second rotation position can be performed in parallel. Since the holding member is formed in a skewer shape, the object having a through hole can be easily detached from the object. As a result of these, a large number of objects can be efficiently transported using the transport device. In particular, even when the object is continuously supplied from the upstream device one after another, the object can be smoothly moved to the downstream device without stopping the upstream device.

  Here, when the holding member has a length that allows a plurality of objects to be hung, and the discharge unit can remove the plurality of objects at a time from the holding member on which a plurality of objects are hung, Since a plurality of objects can be collectively conveyed by one holding member, the efficiency of conveyance can be further enhanced.

  When the conveyance device further includes a cooling unit that contacts the refrigerant with the holding member in the middle of the path in which the holding member is rotated from the second rotation position to the first rotation position, the heated object is conveyed. In doing so, even if the holding member is heated by the heat from the object, the holding member that has been removed from the object at the second rotational position is in the period until the object is again applied at the first rotational position. Can be cooled. Thereby, the influence of the heat on the holding member is reduced.

  When the transport device further includes a drop-off portion for dropping the object hung on the holding member from the holding member, there is no problem at the second rotational position due to a problem such as a discharge portion or a downstream device. Even if the object cannot be ejected from the holding member, the object remaining on the holding member is dropped at the drop-off portion, so that the holding member can be opened and then the object can be hung at the first rotational position. be able to. Thereby, even when the object is continuously supplied from the upstream device, it is easy to avoid a situation in which the upstream device is stopped in conjunction with the problem of the discharge unit or the downstream device.

  In the case where the holding member is arranged with the axis horizontal and the introduction portion has pushing means for pushing the object toward the proximal end of the holding member, the object to be introduced into the holding member is placed on the holding member. The object can be introduced into the holding member by a simple operation that is arranged on the distal end side and pushes the object toward the proximal end of the holding member with the pushing member.

  In the case where the holding member is arranged with the axis horizontal, and the discharge portion has an extruding means for extruding the object hung on the holding member to the distal end side of the holding member, the object is held by the extruding means. The object can be extracted from the holding member by a simple operation of pushing out to the tip side of the holding member.

It is a perspective view which shows the conveying apparatus concerning one Embodiment of this invention. It is a perspective view which expands and shows the said conveying apparatus from another angle. It is a figure explaining operation | movement of the said conveying apparatus. It is a top view explaining the introduction method of the work to the above-mentioned conveyance device. It is sectional drawing explaining the discharge method of the workpiece | work from the said conveying apparatus.

  Hereinafter, a conveyance device according to an embodiment of the present invention will be described with reference to the drawings.

[Conveyor configuration]
First, the overall configuration and operation of the transport apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS.

  The conveying apparatus 1 concerning one Embodiment of this invention conveys the workpiece | work (object) W which has the through-hole W1. As long as the workpiece W has the through-hole W1, the workpiece W may have any shape or any material. Here, a cylindrical (ring-shaped) workpiece W made of a steel material and in a state immediately after being subjected to hot forging is handled.

  After receiving the hot forging, the workpieces W are conveyed one by one by a supply device 80 from a forging device (not shown) and supplied to the main conveying device 1 in a high temperature state. Then, after being transported by the transport device 1, it is delivered to the receiving device 90 in a high temperature state. The receiving device 90 conveys the workpiece W received from the conveying device 1 to a heat treatment furnace (not shown).

  The conveyance device 1 according to the embodiment of the present invention includes a rotating unit 2, a motor 3, four holding members 4, a shooter unit 5, an introduction unit 6, and a discharge unit 7. In addition, although not shown in the drawings, a cooling unit that can eject the airflow A is provided.

  The rotating unit 2 is a plate-like member having a substantially cross shape. The rotating unit 2 can be rotated by the motor 3 around a virtual rotating shaft 21 that passes through the cross point. The rotating unit 2 and the motor 3 are arranged so that the rotating shaft 21 is substantially horizontal.

  In the rotating part 2, four holding members 4 are erected in the vicinity of the end of each branch of the cross. The four holding members 4 are made of skewered metal materials having the same diameter and length. The four holding members 4 are erected at positions that are equidistant from the rotating shaft 21 of the rotating unit 2 and spaced by 90 ° about the rotating shaft 21 with their axes parallel to the rotating shaft 21. In FIG. The length of the holding member 4 is at least five times the thickness of the workpiece W (the dimension in the direction along the axis of the through hole W1), and at least five workpieces W can be hung. The outer diameter of the holding member 4 is set to be at least smaller than the inner diameter of the through-hole W1 of the workpiece W, and further, a support shaft pair 84 of the supply device 80 and a receiving shaft 91 of the receiving device 90, which will be described later, respectively. The thickness is preferably set so as to be inserted into the through hole W1. It is preferable that the holding member 4 is made of a material having heat resistance to such an extent that deformation or alteration is not substantially received at least at the temperature of the workpiece W immediately after hot forging, which is a conveyance target.

  The rotation direction of the rotating part 2 is set to a counterclockwise direction when viewed from the front end side of the holding member 4 as indicated by an arrow R in FIGS. The rotating unit 2 is controlled by an intermittent operation in which the rotation is stopped when it is rotated by a predetermined angle, and the rotation is started again after a predetermined time has elapsed. Specifically, as shown in FIGS. 1 to 3, a state where two opposing members of the four holding members 4 are arranged in the vertical direction and the other two opposing members are arranged in the horizontal direction is the stop position. As a result, it is rotated 90 ° from one stop position to the next stop position, and is stopped for a predetermined stop time. Here, the stop time is long enough to allow the operation of introducing the workpiece W to the holding member 4 and discharging the workpiece W from the holding member 4 to be described later. The sensor provided in the section 7 detects that the introduction and discharge of the workpiece W are completed, and the process is terminated. And after completion | finish of stop time, the rotation part 2 rotates 90 degrees again, and is stopped in the next stop position. Thus, the intermittent rotation of 90 ° rotation → stop → 90 ° rotation → stop →... Is repeated.

  Next, the operation of the transport device 1 including intermittent rotation of the rotating unit 2 will be described with particular reference to FIG. Here, as shown in FIG. 2, with respect to the rotation position of each holding member 4, the position on the right side as viewed from the front end side of the holding member 4 in the state where the rotating unit 2 is stopped at the stop position is the first rotation. The position P1, the upper position is referred to as a second rotational position P2, the left rotational position is referred to as a third rotational position P3, and the lower rotational position is referred to as a fourth rotational position P4.

  In the state where the rotating part 2 is in the stop position, the introduction part 6 supplies the holding member 4 (referred to as a holding member 4a for convenience) disposed at the first rotation position P1 and not covered with the workpiece W. Work W is introduced from the device 80. Although details of the introduction method will be described later, as indicated by an arrow a1 in FIG. 3, the workpieces W are sequentially supplied from the supply device 80 one by one to a position in the vicinity of the tip of the holding member 4a. The workpiece W is moved to a position where the shaft of the holding member 4a is inserted into the hole W1. Thereby, the workpiece | work W is hung on the holding member 4a. This operation is repeated five times, and five workpieces W are hung on the holding member 4a. When all the five workpieces W are put on the holding member 4a and the stop time is finished, the motor 3 rotates the rotating unit 2 by 90 °. The holding member 4a on which the workpiece W is hung at the first rotation position P1 moves to the second rotation position P2.

  Five workpieces W are hung on the holding member 4 (referred to as a holding member 4b for convenience) that has reached the second rotational position P2. Although details will be described later, as indicated by an arrow a2 in FIG. 3, the five workpieces W hung on the holding member 4b are extracted from the holding member 4b at a time by the discharge unit 7 and are received by the receiving device 90. The receiving shaft 91 is moved. Thereby, the holding member 4b becomes an empty state in which the workpiece W is not hung. When all five workpieces W are discharged from the holding member 4b and the stop time ends, the motor 3 rotates the rotating unit 2 by 90 °. The holding member 4b emptied at the second rotational position P2 moves to the third rotational position P3.

  The holding member 4 (referred to as a holding member 4c for convenience) that has reached the third rotational position P3 is heated to a high temperature through hot forging during the period from the first rotational position P1 to the second rotational position P2. Since the workpiece W was applied, the temperature was high. At the third rotational position P3, the holding member 4c is blown with an air flow A that is lower in temperature than the temperature of the holding member 4c. Thereby, the holding member 4c is cooled. In this state, when the stop time elapses, the motor 3 rotates the rotating unit 2 by 90 °. The holding member 4c cooled at the third rotational position P3 moves to the fourth rotational position P4.

  If the workpiece W is normally discharged at the second rotational position P2, the holding member 4 that has reached the fourth rotational position P4 (referred to as a holding member 4d for convenience) hangs even one workpiece W. It is in a state that has not been done. In this case, no operation is performed on the holding member 4d at the fourth rotational position P4. Until the stop time elapses, the vehicle waits at the fourth rotational position P4, then moves to the first rotational position P1 again, and receives a new workpiece W from the supply device 80.

  On the other hand, if the discharge of the workpiece W at the second rotational position P2 is not normally completed due to the malfunction of the discharge unit 7, the receiving device 90, or a further downstream device, the fourth rotational position P4 is reached. There is a possibility that the workpiece W remains on the holding member 4d. In this case, as shown by a dotted line and an arrow a3 in FIG. 3, the remaining workpiece W is dropped from the holding member 4d toward the shooter portion 5. The workpiece W is dropped off by a drop-off portion (not shown). As a specific configuration of the drop-off portion, a mechanism having a mechanism similar to that of the discharge portion 7 described later, that is, the workpiece W hung on the holding member 4d is moved from the proximal end side to the distal end side of the holding member 4d. The thing which has a pusher to extrude can be illustrated. The work W dropped on the shooter unit 5 slides down the slope provided on the shooter unit 5 and is collected in a collection container provided appropriately below the shooter unit 5. The holding member 4d from which the workpiece W remaining at the fourth rotational position P4 has been removed moves to the first rotational position P1 again after the stop time, and receives supply of a new workpiece W from the supply device 80. .

  In the present transport device 1, all four holding members 4 are sequentially introduced into the workpiece W at the first rotational position P1, discharged from the workpiece W at the second rotational position P2, and cooled at the third rotational position P3. → The work W is dropped at the fourth rotational position P4 as necessary → The work W is introduced at one rotational position P1. Thereby, four processes are each implemented with a time difference with respect to each holding member 4 (and the workpiece | work W hung on each holding member 4). The above operations are performed in parallel.

[Introduction of work in the introduction section]
Here, a specific example of a method for introducing the workpiece W into the holding member 4a at the first rotational position P1 will be described with reference to FIG.

  The supply device 80 that supplies the workpiece W conveys the workpiece W along a supply direction a4 perpendicular to the axis of the holding member 4a of the conveying device 1, and is disposed outside the tip of the holding member 4a. At this time, the workpiece W is arranged in the immediate vicinity of the tip of the holding member 4a so that the axis of the through hole W1 is parallel to the axis of the holding member 4a and the extension line of the axis of the holding member 4a overlaps the through hole W1. Is done. Hereinafter, the position and arrangement of the workpiece W are referred to as an introduction state Pi. The workpiece W having taken the introduction state Pi is moved from the supply device 80 to the holding member 4a by the introduction unit 6.

  As a configuration of the supply device 80 capable of continuously supplying the workpiece W to the introduction state Pi, two long moving bodies 81 and 82 are arranged along the supply direction a4 and moved. A configuration in which a set of a support shaft 83 and a support shaft pair 84 is provided at a plurality of equally spaced locations along the longitudinal direction of the bodies 81 and 82 can be given. A support shaft 83 is provided for the first moving body 81 disposed on the proximal end side of the holding member 4a, and a support shaft pair 84 including two shafts is provided for the second moving body 82 disposed on the distal end side of the holding member 4a. Is provided so as to protrude from the longitudinal axis of each of the moving bodies 81 and 82. The support shaft 83 and the support shaft pair 84 are inserted into the through-hole W1 of the workpiece W from opposite directions, so that the workpiece W can be held without rotating and swinging. The moving bodies 81 and 82 are moved along the longitudinal direction along a rail (not shown). By the movement of the moving bodies 81 and 82, the workpiece W held on the support shaft 83 and the support shaft pair 84 can be transported in the supply direction a4. Here, the second moving body 82 can move to a position on the extension of the axis of the holding member 4a, and the workpiece W supported by the support shaft pair 84 can be arranged in the introduction state Pi. The first moving body 81 can move only along the supply direction a4 to the end position that is in front of the holding member 4a and does not interfere with the holding member 4a. The rail that moves the first moving body 81 and the base material that forms the lower surface of the supply device 80 are also provided only up to this end position in order to avoid interference with the holding member 4a.

  As the introduction part 6 of the conveying apparatus 1, what has the pusher 61 as a pushing means can be mentioned. The pusher 61 is driven by the cylinder and can move back and forth in parallel with the axis of the holding member 4a (movement m1 in FIG. 1). An extrusion plate 62 is provided at the tip of the pusher 61. In the state in which the pusher 61 is retracted, the pusher plate 62 is held by the support shaft pair 84 of the supply device 80 and can be retracted backward from the workpiece W in the introduction state Pi, and the pusher 61 moves forward from there. The workpiece W supported by the support shaft pair 84 in the introduction state Pi can be pushed toward the holding member 4a by the pusher plate 62. The push-out plate 62 has a substantially U-shape so that the work W supplied from the supply device 80 can be pushed out by avoiding the support shaft pair 82 (see FIG. 1).

  In the supply device 80, the work W is transported by moving the moving bodies 81 and 82 in the supply direction a4 while the work W is supported by the support shaft 83 and the support shaft pair 84. When the workpiece W reaches the end position of the first moving body 81, the support shaft 83 is retracted, and the through hole W1 of the workpiece W is removed. Thereafter, when the workpiece W supported only by the support shaft pair 84 reaches the introduction state Pi, the push-out plate 62 of the introduction portion 6 that has been retracted is advanced by the pusher 61 (in FIG. 4, broken line → solid line). ), Press the work W. As a result, the workpiece W leaves the support shaft pair 84 and is pushed into the proximal end side of the holding member 4a. In this way, the workpiece W is moved from the supply device 80 to the holding member 4 a and is introduced into the transport device 1.

  Since the supply device 80 is provided with a plurality of pairs of support shafts 83 and support shaft pairs 84 along the longitudinal axis of the moving bodies 81 and 82, the plurality of workpieces W are successively conveyed at predetermined time intervals. , Can be brought to the introduction state Pi. Each time the workpiece W in the introduction state Pi is pushed by the pusher 61 via the push-out plate 62 of the introduction portion 6, a plurality of workpieces W can be hung on the holding member 4a. When the next workpiece W is pushed by the pusher 61 while the workpiece W is already hung on the holding member 4a, the force applied from the pusher 61 is also transmitted to the workpiece W already hung on the holding member 4a. The workpiece W already hung moves to the base end side of the holding member 4a. In this way, a predetermined number (here, 5) of workpieces W can be sequentially hung on the holding member 4a.

[Discharge of work in the discharge section]
Next, a specific example of a method for discharging the workpiece W from the holding member 4b at the second rotational position P2 will be described with reference to FIG.

  The workpiece W hung on the holding member 4 b is moved to the receiving device 90 by the discharge unit 7. The discharge part 7 has a pusher 71 as an extruding means. The pusher 71 is provided with an extrusion plate 72 that protrudes laterally. The pusher 71 is driven by the cylinder and can advance and retreat (movement m2 in FIG. 1), whereby the pusher plate 72 can advance and retreat along the axis of the holding member 4b at the second rotational position P2. ing. The push-out plate 72 is provided on the rear end side of the holding member 4b at the second rotational position P2, and has a notch 72a so as not to interfere with the holding member 4b. When the pusher 71 is retracted, the pusher plate 72 does not interfere with the workpiece W hung on the holding member 4b. From there, when the pusher plate 72 is advanced by the pusher 71 (solid line → broken line in FIG. 2), among the five workpieces W hung on the holding member 4b, the workpiece arranged on the most proximal side. A force toward the distal end of the holding member 4b can be applied to the workpiece W by contacting the base end side surface of W.

  The receiving device 90 that receives the workpiece W from the holding member 4b has a skewer-shaped receiving shaft 91. The receiving shaft 91 has a length that is at least five times the thickness of the workpiece W, and can simultaneously hang five workpieces W. The receiving shaft 91 is coupled to a robot arm (not shown) and can freely change its posture and position. Further, the receiving device 90 has a support column 93 provided in parallel to the receiving shaft 91 at a position corresponding to the outside in the radial direction of the workpiece W hung on the receiving shaft 91. A drop-off prevention member 92 is provided as a plate piece rotatable with respect to the shaft. The drop-off prevention member 92 can prevent the workpiece W from dropping off from the receiving shaft 91 by interfering with the workpiece W hung on the receiving shaft 91 in a state of being rotated toward the receiving shaft 91.

  When discharging the workpiece W from the holding member 4b arranged at the second rotational position P2, the receiving device 90 uses the robot arm to move the receiving shaft 91 of the holding member 4b on which the five workpieces W are hung. It arrange | positions in parallel with an axis | shaft and abuts at least one part of the mutual front end surface of the receiving shaft 91 and the holding member 4b. In this state, the pusher plate 72 that has been retracted is advanced by the pusher 71. Then, a force is applied from the push-out plate 72 to the workpiece W arranged on the most proximal side of the holding member 4b toward the front end side of the holding member 4b. By transmitting this force to all the workpieces W applied to the holding member 4b, all the workpieces W are moved to the receiving shaft 91 at a time and discharged from the holding member 4b. Thereafter, the group of workpieces W is pressed against the proximal end side of the receiving shaft 91 by the pusher 71 and the receiving plate 72, and then the drop prevention member 92 of the receiving device 90 is rotated toward the receiving shaft 91 side. Then, the receiving shaft 91 is moved by the robot arm in a state where the dropping prevention member 92 prevents the workpiece W from dropping, and is moved to the heat treatment furnace.

[Effect of improved transfer efficiency by transfer device]
In the transport device 1 according to the present embodiment, the following effects are achieved by having the above configuration. In the transport apparatus 1, a plurality of holding members 4 are provided around the rotation shaft 21, and each holding member 4 sequentially reaches the first rotation position P <b> 1 by being rotated around the rotation shaft 21. Further, it moves to the second rotational position P2. At the first rotation position P1, the workpiece W is introduced from the supply device 80 to the holding member 4 by the introduction unit 6, and at the second rotation position P2, the workpiece W is discharged to the receiving device 90 by the discharge unit 7. The introduction and discharge of the workpiece W are performed at different rotation positions, ie, the first rotation position P1 and the second rotation position P2, using different members such as the introduction portion 6 and the discharge portion 7, so that both operations can be performed simultaneously. Can proceed in parallel. As a result, a plurality of workpieces W can be simultaneously transported from the supply device 80 via the transport device 1 to the receiving device 90 with a time difference. As a result, the workpiece W continuously supplied from the supply device 80 is efficiently moved from the first rotation position P1 to the second rotation position P2 without being delayed, and further received by the receiving device 90. Can pass. It is not necessary to limit the operation speed of the supply device 80 or a further upstream device or to intermittently stop the operation by the speed of delivery of the workpiece W to the receiving device 90. In particular, the introduction of the workpiece W from the supply device 80 and the discharge of the workpiece W to the receiving device 90 are respectively performed at the first rotation position P1 and the second rotation position P2 having different rotation angles around the rotation shaft 21. Thus, the introduction of the work W by the introduction unit 6 and the discharge of the work W by the discharge unit 7 are facilitated to proceed simultaneously while avoiding spatial interference.

  Furthermore, in this conveyance apparatus 1, the holding member 4 is comprised as a simple skewer-like member which does not have the stopper part etc. which protruded from the axis | shaft, and the workpiece | work W is arrange | positioned with the axis | shaft substantially horizontal. The workpiece W can be detached from the holding member 4 simply by performing an operation of sliding the tool toward the proximal end side or the distal end side along the axis of the holding member 4. Thereby, introduction and discharge of the workpiece W can be performed at high speed while the introduction unit 6 and the discharge unit 7 have a simple configuration. In particular, the support shaft pair 84 for delivering the workpiece W on the supply device 80 side and the receiving shaft 91 for delivering the workpiece W on the receiving device 90 side are also configured as skewers like the holding member 4 for pushing and pushing. The work between the holding member 4, the supply device 80, and the receiving device 90 can be applied to the work W by using the pushers 61 and 71. The movement of W can be performed easily. If the holding member 4 is configured with a length that allows a plurality of workpieces W to be hung, a group of the plurality of workpieces W can be simultaneously conveyed by one holding member 4, which further increases the efficiency of conveyance. it can. The holding member 4 is configured in a skewer shape and inserted into the through-hole W1 of the workpiece W so as to hold the workpiece W. In addition to the efficiency of introduction and discharge of the workpiece W, the holding member 4 is held. There is also an effect of keeping the contact area of the member 4 small. When the workpiece W is a metal material immediately after being subjected to hot forging and is transferred to the heat treatment furnace via the transfer device 1 while being in a high temperature state, the workpiece W is transferred during transfer by the transfer device 1. It is preferable to keep the temperature as high as possible. By reducing the contact area between the holding member 4 and the workpiece W, uneven heat removal from the workpiece W by the holding member 4 can be suppressed.

  In the transport device 1 of the above embodiment, the third rotation position P3 is provided in the middle of the path where the holding member 4 having discharged the workpiece W at the second rotation position P2 returns to the first rotation position P1. An air flow A as a refrigerant is brought into contact with the holding member 4. When the workpiece W is a metal material immediately after being subjected to hot forging, the holding member 4 that has been in contact with the high-temperature workpiece W during the period from the first rotation position P1 to the second rotation position P2 is heated. Is in a state of receiving. After the holding member 4 is cooled by the air flow A, it can be used for the introduction of the workpiece W again at the first rotational position P1. By cooling the holding member 4, it is possible to prevent the holding member 4 from being deformed or altered due to thermal effects. From the viewpoint of avoiding local cooling of the work W, it is preferable that the air flow A does not contact the work W positioned in each part of the transport device 1, the supply device 80, and the receiving device 90.

  Furthermore, in the transport device 1 of the above embodiment, the workpiece W that has not been normally ejected from the holding member 4 at the second rotational position P2 is dropped from the holding member 4 at the fourth rotational position P4, and the holding member 4 is removed. Can be emptied. As a result, even when the workpiece W cannot be normally discharged from the holding member 4 at the second rotational position P2 due to an abnormality in the receiving device 90 or a further downstream device, the holding member 4 is then moved to the first position. When the rotational position P1 is reached, the workpiece W continuously supplied from the supply device 80 can be normally received. As a result, if problems that occur in the receiving device 90 and downstream devices are minor, it is not necessary to immediately stop the devices provided upstream such as the supply device 80 and the forging device. In the above embodiment, the fourth rotation position P4 for dropping the workpiece W is set separately from the second rotation position P2, and the dropout portion is provided separately from the discharge portion 7. However, the discharge portion 7 is used as the dropout portion. Also, the workpiece W may be dropped at the second rotational position P2. Further, the workpiece W may be dropped by the dropping portion before the holding member 4 is cooled by the cooling portion.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Conveying device 2 Rotating part 3 Motor 4 Holding member 4a Holding member 4b in the first rotation position P1 Holding member 4c in the second rotation position P2 Holding member 4d in the third rotation position P3 Fourth rotation position P4 holding member 5 shooter part 6 introduction part 61 pusher 62 pusher plate 7 discharge part 71 pusher 72 pusher plate 80 supply device 83 support shaft 84 support shaft pair 90 receiving device 91 receiving shaft 92 drop-off prevention member W work W1 through hole

Claims (5)

A rotating part that rotates about a rotation axis;
A plurality of skewer-shaped holding members that are oriented parallel to the rotation axis and whose proximal ends are fixed to the rotation portion at mutually different angular positions around the rotation axis;
In a state where one of the holding members is in the first rotation position, an introduction portion that hangs an object having a through hole on the one holding member in the through hole;
In a state where one of the holding members is in a second rotation position different from the first rotation position, a discharge unit that extracts the object hung on the one holding member;
And a cooling unit for bringing the holding member into contact with the refrigerant in the middle of a path along which the holding member is rotated from the second rotation position to the first rotation position . The holding member has a length by which a plurality of the objects can be hung,
The conveying device according to claim 1, wherein the discharge unit can remove the plurality of objects at a time from the holding member on which the plurality of objects are hung. The conveying device, the conveying device according to the object to be hung on the holding member to claim 1 or 2, further comprising a falling portion to fall off from the holding member. The holding member is arranged with the axis horizontal,
The introduction unit, the transport device according to any one of claims 1 to 3, characterized in that it comprises a pushing means for pushing said object toward the proximal end of said retaining member. The holding member is arranged with the axis horizontal,
The discharge unit, conveying device according to claim 1, any one of 4, characterized in that it comprises a pushing means for pushing the object to be hung on the retaining member to the distal end side of the holding member.

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