JP2005186174A - Conveyer apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyer apparatus, safely reloading works without stopping an assembling line. <P>SOLUTION: This conveyer apparatus is composed of: a guide rail 3 disposed like a loop stretching between a machining area 1a for machining a work and a reloading area 1b for reloading works; a truck 2 moved along the guide rail 3; a machining area chain 4 on the machining area 1a side, which is provided along the guide rail 3 to supply power for moving the truck 2; a reloading area chain 5 on the reloading area 1b side for supplying power for moving at a higher speed than the machining area 1a; first and second engagement mechanisms where the engagement parts formed on the truck 2 and the chains 4, 5 are engaged to transmit power to the truck 2 in the machining area 1a and the reloading area 1b; and a power interrupting mechanism for temporarily stopping the transmission of power of the second engagement mechanism to stop the truck 2 in the process of work reloading operation in a work reloading position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a conveyor device, for example, a transport conveyor device of an assembly line that transports a workpiece on a carriage in the assembly line.

  2. Description of the Related Art Conventionally, a conveyor device for an assembly line continuously conveys a workpiece, and performs a series of assembly operations without stopping the flow of the workpiece conveyance line. For this reason, it is necessary to form a transfer device having a self-propelled mechanism capable of re-loading the workpiece in a state synchronized with the line conveyor in the conventional conveyor device. The transfer apparatus was used without stopping the line conveyor.

  However, a transfer device having a self-propelling function capable of transferring workpieces in synchronism with the conveyor device must be complicated in structure, so that the cost of the device becomes high. It was.

  Therefore, it is conceivable that the work transshipment work is performed manually by the operator. In this case, the worker is performing the work transshipment work so that the worker does not drop the work. However, it is necessary to stop the conveyor device for safety, and there is a problem that the work efficiency is lowered overall.

  The present invention has been made in consideration of the above-mentioned matters, and its purpose is to safely reload workpieces without stopping the assembly line while having a simple configuration with reduced manufacturing costs. It is providing the conveyor apparatus which can do.

  In order to achieve the above object, the assembly line conveyor device according to the first aspect of the present invention is a guide arranged in a loop extending over a processing area where a workpiece is processed and a transshipment area where the workpiece is transferred. A rail, a carriage configured to be movable along the guide rail, an endless body for the machining area provided along the guide rail on the machining area side for supplying power to move to the carriage, and transshipment An endless body for a transshipment area that is provided along a guide rail on the area side and supplies power for moving the carriage at a higher speed than in the processing area, and an endless body for the carriage and the processing area in the processing area. A first engagement mechanism that transmits power from the endless body for processing region to the carriage by engaging the formed engaging portion, and the endless body for the carriage and the transshipment region in the transshipment region. Engaged parts The second engagement mechanism that transmits power from the endless body for the transshipment area to the carriage, and the workpiece transfer by temporarily stopping the transmission of power by the second engagement mechanism at the position where the workpiece is reloaded It is characterized by comprising a power interrupting mechanism capable of stopping the cart during work (claim 1).

  When the carriage is located at the boundary between the processing area and the transshipment area, the switching means and the product of the endless body for the processing area are arranged so that both the first engagement mechanism and the second engagement mechanism can be engaged. A switching means for an endless body for a replacement region may be arranged (claim 2).

  The power interrupting mechanism has a stopper installed along the endless body for the transshipment area, and the stopper can be moved to a holding position where the stopper contacts the second engagement mechanism and an opening position where the stopper does not contact the second engagement mechanism. On the other hand, the second engagement mechanism may be configured to cut off the transmission of power from the endless body for the transshipment region in the contact state of the contact piece. (Claim 3).

  The power interrupting mechanism is formed at both the loading position and the unloading position of the workpiece, and the power interrupting mechanism at the loading position restarts the transmission of power by the second engagement mechanism at the end of the loading operation. The power interrupting mechanism at the shifting position may be controlled to resume transmission of power by the second engagement mechanism at the end of both the unloading operation and the loading operation.

  The power interrupting mechanism is formed in the transshipment region upstream of the unloading position, and the power interrupting mechanism transmits power by the second engagement mechanism at the end of both the unloading operation and the loading operation. May be controlled to resume (claim 5).

  The power interrupting mechanism is formed in the transshipment area downstream of the loading position, and the power interrupting mechanism is engaged with the carriage transported to the boundary between the processing area and the transshipment area by the endless body for the transshipment area. The power transmission by the second engagement mechanism may be resumed at a timing at which the portion can be engaged with the engagement portion of the endless body for the processing region.

  In the conveyor apparatus of Claim 1, the endless body for processing areas which supplies the power for moving in the processing area, and the endless body for transshipment areas which supplies the power for moving in the transshipment area Since the conveyor device is formed by using two types of conveyors, the moving speed of the carriage can be increased at the position where the workpieces in the transshipment area are to be reloaded. It is possible to temporarily stop the movement of the inside carriage, and it is possible to safely carry out the work transshipment work on the carriage.

  On the other hand, it is possible to transport the carriage to the area where various assembly operations such as assembly processing are performed in the machining area using the machining area endless body. The movement of the assembly line is not stopped by performing continuously. Further, since the interval between the workpieces in the machining region is determined by the interval between the engaging portions formed on the endless body for the machining region, the workpiece conveyance pitch can be fixed simply by setting the intervals to equal intervals. .

  Further, the configuration of the conveyor device is not significantly different from the configuration of the conventional conveyor device, and is extremely simple, so that this conveyor device can be manufactured at a low cost. That is, the conveyor device of the present invention can be formed by making a slight specification change to the conventional conveyor device.

  When the carriage is located at the boundary between the processing area and the transshipment area, the switching means and the product of the endless body for the processing area are arranged so that both the first engagement mechanism and the second engagement mechanism can be engaged. In the case where the switching area endless body switching means is arranged (Claim 2), the switching means supports the processing area endless body and the transshipment area endless body and first engagement. Since the mechanism and the second engagement mechanism can be switched, the configuration of the conveyor device can be simplified. In addition, by arranging the switching means at the boundary between the processing area and the transshipment area, when the engagement mechanism of one conveyor and the carriage is separated with the rotation of the switching means for winding the endless body, the other conveyor and the carriage Since the configuration in which the engagement mechanism engages can be easily formed, the operation of transferring the carriage transported by one conveyor to the other conveyor can be reliably performed.

  The power interrupting mechanism has a stopper installed along the endless body for the transshipment area, and the stopper can be moved to a holding position where the stopper contacts the second engagement mechanism and an opening position where the stopper does not contact the second engagement mechanism. When the second engagement mechanism is configured to be able to cut off the transmission of power from the endless body for the transshipment region in the contact state of the contact piece. In item 3), the movement of the carriage can be controlled by controlling the position of the contact piece of the stopper. That is, when the operator wants to stop the carriage, the contact piece of the stopper installed at that position may be moved to the holding position. On the other hand, when the operator wants to transport the carriage, the stopper contact piece may be moved to the open position. The control of the stopper may be performed electrically by, for example, sequence control.

  The power interrupting mechanism is formed at both the loading position and the unloading position of the workpiece, and the power interrupting mechanism at the loading position restarts the transmission of power by the second engagement mechanism at the end of the loading operation. When the power interrupting mechanism in the loading position is controlled to resume the transmission of power by the second engagement mechanism at the end of both the unloading work and the loading work (Claim 4), Both work loading and unloading work at the unloading position can be performed safely, and the trucks can collide with each other even when the loading work and unloading time are different. There is no.

  The power interrupting mechanism is formed in the transshipment region upstream of the unloading position, and the power interrupting mechanism transmits power by the second engagement mechanism at the end of both the unloading operation and the loading operation. (Claim 5), when it takes time for the operator to unload the work, the next carriage is unloaded temporarily on the upstream side of the position. Since it is possible to accumulate, it is possible to avoid a collision between the carriages in the transshipment area.

  The power interrupting mechanism is formed in the transshipment area downstream of the loading position, and the power interrupting mechanism is engaged with the carriage transported to the boundary between the processing area and the transshipment area by the endless body for the transshipment area. When control is made so that transmission of power by the second engagement mechanism is resumed at a timing at which the portion can be engaged with the engagement portion of the endless body for processing region (claim 6), Since the carriage transported to the boundary with the machining area by the area endless body engages with the first engagement mechanism of the machining area endless body at a predetermined interval, the work of loading the workpiece by the operator is completed quickly. However, this does not disturb the carriage conveyance interval in the processing region.

  FIG. 1 is a diagram showing an overall configuration of an embodiment of a conveyor device 1 according to the present invention, and FIG. 2 is a diagram schematically showing a main configuration of the conveyor device 1. 3 is a view of the carriage 2 used in the conveyor device 1 as viewed from the conveyance direction, FIG. 4 is a view of the carriage 2 as viewed from a direction perpendicular to the conveyance direction, FIG. 5 is a plan view of the carriage 2, and FIG. FIG.

  The conveyor device 1 according to the present invention is arranged across a processing area 1a for processing a workpiece and a transshipment area 1b for transferring a workpiece, and a plurality of carriages 2 are arranged in the processing area 1a. It is an apparatus that conveys at a predetermined speed in a state of being arranged at equal intervals. Further, the carriage 2 is formed with a holder 2a for mounting a workpiece not shown.

  Moreover, the conveyor apparatus 1 is provided along the guide rail 3 arrange | positioned in loop shape ranging over the process area | region 1a and the transshipment area | region 1b, and the guide rail 3 by the side of the process area | region 1a, and moves to the trolley | bogie 2. Is provided along the guide rail 3 on the side of the transshipment region 1b, and moves to the carriage 2 at a higher speed than the processing region 1a. And a transshipment region chain 5 as an example of an endless member for a transshipment region that supplies power for the purpose. In the following example, a chain is given as an example of the endless body 4 for the processing area and the endless body 5 for the transshipment area. However, the endless bodies 4 and 5 are not limited to the chain, but may be a belt or a wire. And if it is an elongate endless body and can supply the power for hooking and moving to the carriage 2, it can be used.

  The machining region chain 4 includes a plurality of sprockets 6 arranged in the machining region 1a, a switching sprocket (an example of switching means) 7 and a tension adjusting sprocket 8 arranged at a boundary 1c between the machining region 1a and the transshipment region 1b. The chain is arranged in a loop with some tension applied thereto, and the processing region chain 4 is configured to be driven at a predetermined speed. On the other hand, the transshipment region chain 5 is configured to be driven at a higher speed than the machining region chain 4 by a switching sprocket (an example of switching means) 9 formed coaxially with the switching sprocket 7. Each of the sprockets 6 to 9 is an example of a winding wheel, and a pulley or the like can be considered in addition to the sprocket. For example, when the endless bodies 4 and 5 are belts or wires, pulleys are used.

  As shown in FIGS. 3 and 6, the guide rail 3 is a loop-shaped groove having a predetermined width and depth, for example, and 10 is projected downward at the bottom of the carriage 2 so that it can be inserted into the guide rail 3. This is a guide roller having a large diameter. That is, the carriage 2 is configured to move along the guide rail 3 when the guide roller 10 contacts the inner wall portion of the groove in the guide rail 3. Further, since the guide rail 3 and the guide roller 10 are formed below the inside of the carriage, the guide rail 3 and the guide roller 10 do not interfere with the processing operation, and the guide rail 3 and the guide roller 10 10 does not deteriorate the appearance of the conveyor device 1.

  Reference numeral 11 denotes a first engagement mechanism for transmitting power from the processing region chain 4 to the carriage 2, and the first engagement mechanism 11 is an example of an engagement portion formed in the lower portion of the carriage 2. It consists of a first hook 12 and a protrusion (hereinafter referred to as a dock) 13 as an example of an engaging portion that protrudes from the processing region chain 4.

  As shown in FIG. 2, the docks 13 are formed in the machining region chain 4 at a constant interval of 2000 pitches, for example. Therefore, by hooking the first hooks 12 of one carriage 2 on each dock 13, each carriage 2 is conveyed at a predetermined interval of 2000 pitches. Thereby, although the adjacent trolley | bogie 2 can process with respect to the conveyed workpiece | work, it is not limited to this space | interval. That is, by changing the interval between the docks 13, it is possible to arbitrarily set the interval between adjacent carts 2 that are transporting the processing region 1 a.

  In addition, since the conveyance speed of the processing region chain 4 needs to be equal to or less than the time required for processing one workpiece in each processing operation, in this example, for example, one cart 2 is provided every 1.4 minutes. Although it is transported at such a low speed as to be transported, the present invention is not limited to this speed. In other words, the operating speed of the processing region chain 4 can be made higher than the above speed as long as it is within the maximum time required for each processing step in the processing region 1a.

  Reference numeral 15 shown in FIGS. 2, 3 and 6 denotes a second engagement mechanism for transmitting power from the transshipment region chain 5 to the carriage 2 in the transshipment region 1a. The first engagement mechanism 11 is arranged side by side. The second engagement mechanism 15 includes a second hook 16 as an example of an engagement portion formed in the lower portion of the carriage 2 and a projection portion (hereinafter referred to as an example of an engagement portion formed to protrude from the transshipment region chain 5). 17).

  In particular, as shown in FIG. 2, the docks 17 are provided at intervals shorter than the dock 13, for example. In the conveyor apparatus 1 of the present example, the hooks 12 and 16 are provided at the upper and lower portions on the carriage 2 that conveys the workpiece, so that the first hook 12 is attached to the dock 13 of the machining region chain 4 as shown in FIG. While being able to be engaged, the carriage 2 in the processing area 1a can be conveyed, while the second hook 16 can be engaged with the dock 17 of the transshipment area chain 5 to convey the carriage 2 in the transshipment area 1b. , 1b, both hooks 12, 16 can be engaged with the docks 13, 17 at the boundary 1c.

  As described above, in the conveyor device 1 of the present invention, the carriage 2 is conveyed by combining the two conveyors 4 and 5, so that the carriage 2 is conveyed by the processing region chain 4 at a constant speed and at a constant interval. In addition to being able to carry out, it is possible to temporarily stop the carriage 2 by the transshipment region chain 5.

  Further, in the conveyor device 1 of this example, the switching sprockets 7 and 9 are coaxially arranged at the boundary between the machining area and the transshipment area, so that one of the conveyors 4 and 5 and the carriage 2 can be connected with the rotation of the switching sprocket. When the engagement mechanisms 11 and 15 are separated, the other conveyors 5 and 4 and the engagement mechanisms 15 and 11 of the carriage 2 are engaged. That is, as shown in FIG. 2, when the chain of the machining area chain 4 that has transported the carriage 2 moves away from the carriage 2 along the switching sprocket 7, the dock 13 of the machining area chain 4 is hooked to the carriage 2. 12 is disconnected.

  The dock 17 of the transshipment region chain 5 is guided along the switching sprocket 7 and guided along the guide rail 3 almost simultaneously with the separation of the machining region chain 4 and the cart 2. After that, the carriage 2 is engaged by the second hook 17 and then transported by the transshipment region chain 5. That is, it is possible to reliably perform the operation of transferring the carriage 2 conveyed by one conveyor 4, 5 to the other conveyor 5, 4.

  Further, in the conveyor device 1 of this example, a power interrupting mechanism is formed in the second engagement mechanism 15 so that only the transport of the carriage 2 can be partially stopped without stopping the movement of the transshipment region chain 5. Yes. That is, the second engagement mechanism 15 is configured such that the second hook 16 becomes a power interrupt mechanism so that the engagement state can be temporarily released. A detailed configuration of the second hook 16 will be described with reference to FIGS.

  In particular, FIG. 4 shows the configuration of the second hook 16 in detail. The second hook 16 has a generally L-shaped hooking claw piece 18 configured to be tiltable about the shaft 18a and a shaft 19a. A holding claw piece 19 configured to hold the engagement state of the hooking claw piece 18 and the dock 17 with the dock 17 engaged with the hooking claw piece 18, and a hooking claw The connecting piece 20 is connected to the piece 18, and the disengagement operation portion 21 is configured to transmit power for opening the hooking claw piece 18 engaged with the dock 17. Further, the connecting piece 20 is connected between the hooking claw piece 18 and the engagement releasing operation part 21 so that the pushing operation of the engagement releasing operation part 21 becomes power for tilting the hooking claw piece 18. Therefore, the second hook 16 is configured to be able to release the engaged state by a push operation of the disengagement operation unit 21.

  1 and 2, reference numeral 25 denotes a stopper as an example of a power interrupting mechanism arranged at a proper position along the transshipment region chain 5. As shown in FIGS. 2 It is configured to be movable back and forth between a holding position (shown in phantom) that contacts the disengagement operation section 21 of the engagement mechanism 15 and an open position (shown in a two-dot chain line) that does not contact the disengagement operation section 21. The contact piece 26 is provided.

  The contact piece 26 of this example is configured to be controllable by a forward and backward movement of the air cylinder in a direction perpendicular to the conveyance direction of the carriage 2 indicated by an arrow A in FIGS. 4 and 5, and this is a work in the transshipment region 1 b. It is automatically controlled according to the progress of the worker's work. Further, the stopper 25 of this example is configured such that the movement of the carriage 2 can be stopped at that position by bringing the abutment piece 26 into contact with the disengagement operation portion 21.

  That is, when the contact piece 26 is controlled to protrude to the holding position, the disengagement operation portion 21 of the carriage 2 conveyed in the arrow A direction by the transshipment region chain 5 hits the contact piece 26. The engagement release operation unit 21 is pushed by the movement of the carriage 2 in the direction of arrow A. At this time, the hooking claw piece 18 tilts clockwise in FIG. 4 in conjunction with the pushing operation of the disengagement operating portion 21, and the engagement between the second hook 16 (hooking claw piece 18) and the dock 17 is released. The movement of the carriage 2 in the direction of arrow A is stopped by the contact piece 26. Therefore, the carriage 2 is completely stopped at a fixed position.

  Next, when the contact piece 26 is controlled to move back to the open position, the disengagement operation portion 21 is separated from the contact piece 26, so that the hooking claw piece 18 is attached by its own weight or a spring not shown. The hooking piece 18 can be engaged with the dock 17 by tilting counterclockwise by the force. When the next dock 17 is transported to the second hook 16 by the operation of the transshipment region chain 5, the holding claw piece 19 is tilted counterclockwise by an urging force such as its own weight or an unillustrated spring. When the dock 17 hits the dock 17 once and tilts clockwise, and the dock 17 passes the portion of the holding claw piece 19, the dock 17 comes into contact with the hooking claw piece 18 of the second hook 16, and the holding claw piece 19 is anti-reverse again. Tilt clockwise to hold dock 17 in position.

  That is, the movement of the carriage 2 by the transshipment region chain 5 can be resumed by power transmission via the second engagement mechanism 15. Since the interval between the docks 17 formed on the transshipment region chain 5 is set to be shorter than the interval between the docks 12 formed on the processing region chain 4, the hanging claw piece 18 is in the open position. When it returns, it can be quickly engaged with the next dock 17.

  Further, since the transport speed by the transshipment region chain 5 is higher than the transport speed by the processing region chain 4, even if the movement of the carriage 2 is temporarily stopped by releasing the second engagement mechanism 15. When the power transmission via the second engagement mechanism 15 is resumed, the periodic conveyance of the carriage 2 using the machining region chain 4 is not adversely affected.

  In the conveyor apparatus 1 of this example, the stopper 25 having the above-described configuration is loaded with a workpiece loading position 30, a workpiece loading position 31, a standby position 32 upstream of the loading position 30, and a standby position 33 downstream of the loading position 31. Respectively.

  Accordingly, since the stopper 25 is provided at the workpiece unloading position 30, the operator can load and unload the workpiece from the stopped carriage 2. Similarly, since the stopper 25 is provided at the workpiece loading position 31, the operator can load the workpiece onto the cart 2 that is stopped.

  In addition, the stopper 25 formed at the loading position 31 retreats the contact piece 26 to the open position with the completion of the loading operation by the operator, so that the carriage 2 starts to be transported again with the opening operation. can do. Similarly, the stopper 25 formed at the unloading position 30 is formed by, for example, retracting the contact piece 26 to the open position when both the loading operation and the unloading operation by the operator are completed. The carriage 2 can be started again.

  That is, when the unloading position 30 is formed immediately upstream of the loading position 31, even if the work loading operation is delayed as compared with the unloading operation, the upstream stopper 25 is moved to the downstream side. After confirming the state of the stopper 25 and the presence / absence of the carriage 2, the contact piece 26 is retracted to the open position, thereby reliably avoiding a situation in which the following carriage 2 collides with the stopped carriage 2. be able to. This control is desirably performed in the same manner in the stoppers 25 at all positions 30 to 32 having the stopper 25 on the downstream side.

  In addition, since the conveyor device 1 of this example is also provided with the stopper 25 at the standby position 32 on the upstream side of the unloading position 30, a delay occurs in the reloading work at the unloading position 30 and the loading position 31. The next carriage 2 can be stopped even when the vehicle is on. Needless to say, a plurality of standby positions 32 may be formed on the upstream side of the unloading position 30 to further increase safety.

  Furthermore, since the conveyor apparatus 1 of this example is also provided with the stopper 25 at the standby position 33 on the downstream side of the loading position 31, even when the loading operation at the loading position 31 is completed early, the conveyor device 1 is temporarily stopped at the standby position 33. After that, it can be transported to the processing region 1a side. Further, the stopper 25 at the standby position 33 opens at a timing at which the first hook 12 of the carriage can be engaged with the dock 13 of the machining area chain 4, so that it is conveyed to the boundary 1 c by the transshipment area chain 5. The carriage 2 is smoothly conveyed by the machining area chain 4.

It is a perspective view which shows the whole conveyor apparatus of this invention. It is a conceptual diagram which shows the principal part of the said conveyor apparatus. It is the side view which looked at the trolley | bogie of the said conveyor apparatus from the conveyance direction front. It is the side view which looked at the said cart from another direction. It is a top view of the cart. It is a perspective view centering on the said trolley | bogie.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor apparatus 1a Processing area 1b Transshipment area 1c Boundary 2 Carriage 3 Guide rail 4 Processing area chain (Endless body for processing area)
5 Transshipment region chain (endless body for transshipment region)
7,9 Switching sprocket (switching means)
11 First engagement mechanism 12 First hook (engagement portion)
13 Dock (engagement part)
15 Second engagement mechanism 16 Second hook (engagement portion)
17 Dock (engagement part)
18-21 Power interrupt mechanism 25 Stopper (Power interrupt mechanism)
26 Abutting piece 30 Unloading position 31 Loading position 32, 33 Standby position

Claims (6)

A guide rail arranged in a loop across a machining area for machining a workpiece and a transshipment area for transposing a workpiece;
A carriage configured to be movable along the guide rail;
An endless body for a processing area that is provided along a guide rail on the processing area side and supplies power for moving to a carriage,
An endless body for a transshipment area that is provided along a guide rail on the transshipment area side and supplies power to the carriage to move at a higher speed than in the processing area;
A first engagement mechanism that transmits power from the machining area endless body to the carriage by engaging engagement portions formed on the carriage and the machining area endless body in the machining area;
A second engagement mechanism that transmits power from the endless body for the transshipment area to the carriage by engaging the engagement portions formed on the endless body for the transshipment area and the endless body for the transshipment area in the transshipment area;
A conveyor device comprising: a power interrupting mechanism capable of stopping a cart during workpiece transfer work by temporarily stopping transmission of power by the second engagement mechanism at a position where workpieces are transferred.   When the carriage is located at the boundary between the processing area and the transshipment area, the switching means and the product of the endless body for the processing area are arranged so that both the first engagement mechanism and the second engagement mechanism can be engaged. The conveyor apparatus according to claim 1, further comprising switching means for an endless member for a replacement area. The power interrupting mechanism has a stopper installed along the endless body for the transshipment area, and the stopper can be moved to a holding position where the stopper contacts the second engagement mechanism and an opening position where the stopper does not contact the second engagement mechanism. While having a contact piece configured in
The conveyor apparatus of Claim 1 or 2 comprised so that the 2nd engagement mechanism can cut | disconnect the transmission of the power from the endless body for transshipment areas in the contact state of a contact piece. The power interrupting mechanism is formed at both the loading position and unloading position of the workpiece,
The power interrupting mechanism at the loading position resumes the transmission of power by the second engagement mechanism at the end of the loading operation, while the power interrupting mechanism at the unloading position is unloaded at the end of both the loading and unloading operations. The conveyor apparatus in any one of Claims 1-3 controlled so that transmission of the power by 2 engagement mechanism may be restarted. The power interrupting mechanism is formed in the transshipment region upstream of the unloading position;
The conveyor apparatus according to claim 4, wherein the power interrupting mechanism is controlled so as to resume transmission of power by the second engagement mechanism at the end of both the unloading operation and the loading operation. The power interrupting mechanism is formed in the transshipment region downstream of the loading position,
Timing at which this power interrupting mechanism can engage the engaging portion of the carriage transported to the boundary between the processing region and the transshipment region by the endless body for the transshipment region with the engaging portion of the endless body for the processing region. The conveyor device according to claim 1, wherein the conveyor device is controlled to resume transmission of power by the second engagement mechanism.

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